How Many Gallons Are In My Pool

Online Pool Volume Calculator – How Many Gallons Are In My Pool

Leave a Comment / Gallons / By

Knowledge of pool gallons is one of the key steps toward pool maintenance. This figure is essential as it is required to calculate the chemical requirement quantity and the heater requirements of the pool. In the blog – ” How many gallons are in my pool “, we help you to know gallons in 3 ways.

1. Pool Gallons Calculator

In the pool gallon calculator, you can add the dimensions of the pool and calculate the gallons online

Pool Gallons Calculator
Width:
Length:
Depth 1 :
Depth 2 :
Result: US Gallons Imperial Gallons

2. Calculation using formula

This is a simple three-step method, which will help you to calculate gallons.

A. Calculation of gallons in a rectangular pool :

How Many Gallons Are In My Pool

Step 1: DO THE MEASUREMENT

Measure the dimension of the pool such as length (L), width (W), and depth (D). If there are two depths denote D1 for the shallow end and D2 for the deep end.

Step 2: CALCULATE VOLUME

For a rectangular pool, the volume calculation formula is :

CASE 1 – Uniform depth

Volume = Length (L) X Width ( W) X Depth ( D )

CASE 2 – Depth varies at two ends

Volume = Length (L) X Width ( W) X Average Depth ( D )

Average Depth ( D ) = ( Depth D1 + Depth D2 ) / 2

Step 3: CONVERT VOLUME IN GALLONS

CASE 1 – Measurement in US customary units or Imperial system i.e. feet

1 Cubic Foot = 7.48 US Gallons

1 Cubic Foot = 6.23 Imperial Gallons

CASE 2 – Measurement in Metric system i.e. meters

1 Cubic meter = 264.17 US Gallons

1 Cubic meter = 220 Imperial Gallons

Examples

Calculations in US customary units and in the Imperial system

Consider a rectangular pool of 20 feet in length and 10 feet in width with a depth of 5 feet and 10 feet respectively

Average depth = ( 5 + 10 ) / 2 = 7.5 feet

Volume = 20 X 10 X 7.5 cubic feet

Volume = 1500 cubic feet

US gallons = 7.48 X 1500 = 11220 as 1 cubic foot = 7.48 US gallons

~ 11200

Imperial gallons = 6.23 X 1500 = 9345 as 1 cubic foot = is 6.23 Imperial gallons

~ 9300

Calculations in the metric system

Consider a rectangular pool of 12 meters in length and 5 meters in width with a depth of 1.5 meters and 3 meters respectively

Average depth = ( 1.5 + 3 ) / 2 = 2.25 meters

Volume = 12 X 5 X 2.25 cubic meters

Volume = 135 cubic meters

US gallons = 135 X 264.17 = 35663

~ 35700

Imperial Gallons = 135 X 220 = 29700

B. Calculation of gallons in a circular pool :

How Many Gallons Are In My Pool

Step 1: DO THE MEASUREMENT

Measure the dimension of the pool such as diameter (Dia) and depth (D). If there are two depths denote D1 for the shallow end and D2 for the deep end.

Step 2: CALCULATE VOLUME

For a Circular pool, the volume calculation formula is :

CASE 1 – Uniform depth

Volume = Pie X Diameter (Dia) X Diameter (Dia) X Depth ( D ) / 4

= 3.14 X Dia X Dia X D / 4

CASE 2 – Depth varies at two ends

Volume = Pie X Diameter (Dia) X Diameter (Dia) X Average Depth ( D ) / 4

Average Depth ( D ) = ( Depth D1 + Depth D2 ) / 2

Step 3: CONVERT VOLUME IN GALLONS

CASE 1 – Measurement in US customary units or Imperial system i.e. feet

1 Cubic Foot = 7.48 US Gallons

1 Cubic Foot = 6.23 Imperial Gallons

CASE 2 – Measurement in Metric system i.e. meters

1 Cubic meter = 264.17 US Gallons

1 Cubic meter = 220 Imperial gallons

Examples

Calculations in US customary units and in the Imperial system

Consider a circular pool of 20 feet in dia with a depth of 5 feet and 10 feet respectively

Average depth = ( 5 + 10 ) / 2 = 7.5 feet

Volume = 3.14 X 20 X 20 X 7.5 / 4 cubic feet

Volume = 2355 cubic feet

US gallons = 7.48 X 2355 = 17615 as 1 cubic foot = 7.48 US gallons

~ 17600

Imperial gallons = 6.23 X 2355 = 14671 as 1 cubic foot = is 6.23 Imperial gallons

~ 14700

Calculations in the metric system

Consider a circular pool of 12 meters in dia with a depth of 1.5 meters and 3 meters respectively

Average depth = ( 1.5 + 3 ) / 2 = 2.25 meters

Volume = 3.14 X 12 X 12 X 2.25 / 4 cubic meters

Volume = 2354 cubic meters

US gallons = 2354 X 264.17 = 67189

~ 67200

Imperial Gallons = 2354 X 220 = 55955

~ 56000

C. Calculation of gallons in a triangular pool :

How Many Gallons Are In My Pool

Step 1: DO THE MEASUREMENT

Measure the dimension of the pool such as sides ( S1, S2 & S3) and depth (D). If there are two depths denote D1 for the shallow end and D2 for the deep end.

Step 2: CALCULATE VOLUME

For a triangular pool, the volume calculation formula is :

CASE 1 – Uniform depth

In triangular shapes, we need to calculate semi-perimeter before calculating volume.

Semi perimeter SP = ( S1 + S2 + S3 ) / 2

Volume = Square root ( SP X ( SP – S1 ) X ( SP – S2 ) X ( SP – S3 ) X Depth ( D ) / 4

CASE 2 – Depth varies at two ends

Semi perimeter SP = ( S1 + S2 + S3 ) / 2

Volume = Square root ( SP X ( SP – S1 ) X ( SP – S2 ) X ( SP – S3 ) X Average Depth ( D ) / 4

Average Depth ( D ) = ( Depth D1 + Depth D2 ) / 2

Step 3: CONVERT VOLUME IN GALLONS

CASE 1 – Measurement in US customary units or Imperial system i.e. feet

1 Cubic Foot = 7.48 US Gallons

1 Cubic Foot = 6.23 Imperial Gallons

CASE 2 – Measurement in Metric system i.e. meters

1 Cubic meter = 264.17 US Gallons

1 Cubic meter = 220 Imperial Gallons

Examples

Calculations in US customary units and in the Imperial system

Consider a Triangular pool of sides 25 feet, 20 feet, and 15 feet with a depth of 5 feet and 10 feet respectively

Average depth = ( 5 + 10 ) / 2 = 7.5 feet

Semi-perimeter SP = ( 25 + 20 + 15 ) / 2 = 30

Volume = Square root ( 30 X ( 30 – 25 ) X ( 30 – 20) X ( 30 – 15) ) X 7.5 cubic feet

Volume = Square root ( 30 X 5 X 10 X 15 ) X 7.5 cubic feet

Volume = Square root ( 22500) X 7.5 cubic feet

Volume = 150 X 7.5 cubic feet

Volume = 1125 cubic feet

US gallons = 7.48 X 1125 = 8437 as 1 cubic foot = 7.48 US gallons

~ 8400

Imperial gallons = 6.23 X 1125 = 7008 as 1 cubic foot = is 6.23 Imperial gallons

~ 7000

Calculations in the metric system

Consider a Triangular pool of sides 12 meters, 10 meters, and 8 meters in dia with a depth of 1.5 meters and 3 meters respectively

Average depth = ( 1.5 + 3 ) / 2 = 2.25 meters

Semi-perimeter SP = ( 12 + 10 + 8 ) / 2 = 15

Volume = Square root ( 15 X ( 15 – 12 ) X ( 15 – 10 ) X ( 15 – 8 ) ) X 2.25 cubic meters

Volume = Square root ( 15 X 3 X 5 X 7 ) X 2.25 cubic meters

Volume = Square root ( 1575) X2.25 cubic meters

Volume = 39.69 X 2.25 cubic meters

Volume = 89.3 cubic meters

US gallons = 89.3 X 264.17 = 23590

~ 23600

Imperial Gallons = 89.3 X 220 = 19646

~ 19600

D. Calculation of gallons in a square pool :

How Many Gallons Are In My Pool

Step 1: DO THE MEASUREMENT

Measure the pool’s dimensions such as length (L), and depth (D). If there are two depths denote D1 for the shallow end and D2 for the deep end.

Step 2: CALCULATE VOLUME

For a square pool, the volume calculation formula is :

CASE 1 – Uniform depth

Volume = Length (L) X Length (L) X Depth ( D )

CASE 2 – Depth varies at two ends

Volume = Length (L) X Length (L) X Average Depth ( D )

Average Depth ( D ) = ( Depth D1 + Depth D2 ) / 2

Step 3: CONVERT VOLUME IN GALLONS

CASE 1 – Measurement in US customary units or Imperial system i.e. feet

1 Cubic Foot = 7.48 US Gallons

1 Cubic Foot = 6.23 Imperial Gallons

CASE 2 – Measurement in Metric system i.e. meters

1 Cubic meter = 264.17 US Gallons

1 Cubic meter = 220 Imperial Gallons

Examples

Calculations in US customary units and in the Imperial system

Consider a square pool of 20 feet in length with a depth of 5 feet and 10 feet respectively

Average depth = ( 5 + 10 ) / 2 = 7.5 feet

Volume = 20 X 20 X 7.5 cubic feet

Volume = 3000 cubic feet

US gallons = 7.48 X 3000 = 22440 as 1 cubic foot = 7.48 US gallons

~ 22400

Imperial gallons = 6.23 X 3000 = 18690 as 1 cubic foot = is 6.23 Imperial gallons

~ 18700

Calculations in the metric system

Consider a square pool of 12 meters in length with a depth of 1.5 meters and 3 meters respectively

Average depth = ( 1.5 + 3 ) / 2 = 2.25 meters

Volume = 12 X 12 X 2.25 cubic meters

Volume = 324 cubic meters

US gallons = 324 X 264.17 = 85591

~ 85600

Imperial Gallons = 324 X 220 = 71280

~ 71300

3. Checking the Table

A – Rectangular Pool

US Gallons

SizeDepth 3′Depth 3.5′Depth 4′Depth 4.5′Depth 5′Depth 5.5′Depth 6′
How many gallons are in my pool of 10′ X 30′67007900900010100112001230013500
How many gallons are in my pool of 10′ X 33′74008600990011100123001360014800
How many gallons are in my pool of 10′ X 36′810094001080012100135001480016200
How many gallons are in my pool of 10′ X 39′8800102001170013100146001600017500
How many gallons are in my pool of 10′ X 42′9400110001260014100157001730018800
How many gallons are in my pool of 10′ X 45′10100118001350015100168001850020200
How many gallons are in my pool of 10′ X 48′10800126001440016200180001970021500
How many gallons are in my pool of 10′ X 52′11700136001560017500194002140023300
How many gallons are in my pool of 10′ X 55′12300144001650018500206002260024700
How many gallons are in my pool of 12′ X 30′810094001080012100135001480016200
How many gallons are in my pool of 12′ X 33′8900104001180013300148001630017800
How many gallons are in my pool of 12′ X 36′9700113001290014500162001780019400
How many gallons are in my pool of 12′ X 39′10500123001400015800175001930021000
How many gallons are in my pool of 12′ X 42′11300132001510017000188002070022600
How many gallons are in my pool of 12′ X 45′12100141001620018200202002220024200
How many gallons are in my pool of 12′ X 48′12900151001720019400215002370025900
How many gallons are in my pool of 12′ X 52′14000163001870021000233002570028000
How many gallons are in my pool of 12′ X 55′14800173001970022200247002720029600
How many gallons are in my pool of 15′ X 30′10100118001350015100168001850020200
How many gallons are in my pool of 15′ X 33′11100130001480016700185002040022200
How many gallons are in my pool of 15′ X 36′12100141001620018200202002220024200
How many gallons are in my pool of 15′ X 39′13100153001750019700219002410026300
How many gallons are in my pool of 15′ X 42′14100165001880021200236002590028300
How many gallons are in my pool of 15′ X 45′15100177002020022700252002780030300
How many gallons are in my pool of 15′ X 48′16200188002150024200269002960032300
How many gallons are in my pool of 15′ X 52′17500204002330026300292003210035000
How many gallons are in my pool of 15′ X 55′18500216002470027800309003390037000
How many gallons are in my pool of 18′ X 30′12100141001620018200202002220024200
How many gallons are in my pool of 18′ X 33′13300156001780020000222002440026700
How many gallons are in my pool of 18′ X 36′14500170001940021800242002670029100
How many gallons are in my pool of 18′ X 39′15800184002100023600263002890031500
How many gallons are in my pool of 18′ X 42′17000198002260025400283003110033900
How many gallons are in my pool of 18′ X 45′18200212002420027300303003330036400
How many gallons are in my pool of 18′ X 48′19400226002590029100323003550038800
How many gallons are in my pool of 18′ X 52′21000245002800031500350003850042000
How many gallons are in my pool of 18′ X 55′22200259002960033300370004070044400
How many gallons are in my pool of 20′ X 30′13500157001800020200224002470026900
How many gallons are in my pool of 20′ X 33′14800173001970022200247002720029600
How many gallons are in my pool of 20′ X 36′16200188002150024200269002960032300
How many gallons are in my pool of 20′ X 39′17500204002330026300292003210035000
How many gallons are in my pool of 20′ X 42′18800220002510028300314003460037700
How many gallons are in my pool of 20′ X 45′20200236002690030300337003700040400
How many gallons are in my pool of 20′ X 48′21500251002870032300359003950043100
How many gallons are in my pool of 20′ X 52′23300272003110035000389004280046700
How many gallons are in my pool of 20′ X 55′24700288003290037000411004530049400
How many gallons are in my pool of 21′ X 30′14100165001880021200236002590028300
How many gallons are in my pool of 21′ X 33′15600181002070023300259002850031100
How many gallons are in my pool of 21′ X 36′17000198002260025400283003110033900
How many gallons are in my pool of 21′ X 39′18400214002450027600306003370036800
How many gallons are in my pool of 21′ X 42′19800231002640029700330003630039600
How many gallons are in my pool of 21′ X 45′21200247002830031800353003890042400
How many gallons are in my pool of 21′ X 48′22600264003020033900377004150045200
How many gallons are in my pool of 21′ X 52′24500286003270036800408004490049000
How many gallons are in my pool of 21′ X 55′25900302003460038900432004750051800
How many gallons are in my pool of 24′ X 30′16200188002150024200269002960032300
How many gallons are in my pool of 24′ X 33′17800207002370026700296003260035500
How many gallons are in my pool of 24′ X 36′19400226002590029100323003550038800
How many gallons are in my pool of 24′ X 39′21000245002800031500350003850042000
How many gallons are in my pool of 24′ X 42′22600264003020033900377004150045200
How many gallons are in my pool of 24′ X 45′24200283003230036400404004440048500
How many gallons are in my pool of 24′ X 48′25900302003450038800431004740051700
How many gallons are in my pool of 24′ X 52′28000327003730042000467005130056000
How many gallons are in my pool of 24′ X 55′29600346003950044400494005430059200
How many gallons are in my pool of 25′ X 30′16800196002240025200281003090033700
How many gallons are in my pool of 25′ X 33′18500216002470027800309003390037000
How many gallons are in my pool of 25′ X 36′20200236002690030300337003700040400
How many gallons are in my pool of 25′ X 39′21900255002920032800365004010043800
How many gallons are in my pool of 25′ X 42′23600275003140035300393004320047100
How many gallons are in my pool of 25′ X 45′25200295003370037900421004630050500
How many gallons are in my pool of 25′ X 48′26900314003590040400449004940053900
How many gallons are in my pool of 25′ X 52′29200340003890043800486005350058300
How many gallons are in my pool of 25′ X 55′30900360004110046300514005660061700

Imperial Gallons

SizeDepth 3′Depth 3.5′Depth 4′Depth 4.5′Depth 5′Depth 5.5′Depth 6′
How many gallons are in my pool of 10′ X 30′560065007500840093001030011200
How many gallons are in my pool of 10′ X 33′6200720082009300103001130012300
How many gallons are in my pool of 10′ X 36′67007800900010100112001230013500
How many gallons are in my pool of 10′ X 39′73008500970010900121001340014600
How many gallons are in my pool of 10′ X 42′780092001050011800131001440015700
How many gallons are in my pool of 10′ X 45′840098001120012600140001540016800
How many gallons are in my pool of 10′ X 48′9000105001200013500150001640017900
How many gallons are in my pool of 10′ X 52′9700113001300014600162001780019400
How many gallons are in my pool of 10′ X 55′10300120001370015400171001880020600
How many gallons are in my pool of 12′ X 30′67007800900010100112001230013500
How many gallons are in my pool of 12′ X 33′74008600990011100123001360014800
How many gallons are in my pool of 12′ X 36′810094001080012100135001480016100
How many gallons are in my pool of 12′ X 39′8700102001170013100146001600017500
How many gallons are in my pool of 12′ X 42′9400110001260014100157001730018800
How many gallons are in my pool of 12′ X 45′10100118001350015100168001850020200
How many gallons are in my pool of 12′ X 48′10800126001440016100179001970021500
How many gallons are in my pool of 12′ X 52′11700136001560017500194002140023300
How many gallons are in my pool of 12′ X 55′12300144001640018500206002260024700
How many gallons are in my pool of 15′ X 30′840098001120012600140001540016800
How many gallons are in my pool of 15′ X 33′9300108001230013900154001700018500
How many gallons are in my pool of 15′ X 36′10100118001350015100168001850020200
How many gallons are in my pool of 15′ X 39′10900128001460016400182002000021900
How many gallons are in my pool of 15′ X 42′11800137001570017700196002160023500
How many gallons are in my pool of 15′ X 45′12600147001680018900210002310025200
How many gallons are in my pool of 15′ X 48′13500157001790020200224002470026900
How many gallons are in my pool of 15′ X 52′14600170001940021900243002670029200
How many gallons are in my pool of 15′ X 55′15400180002060023100257002830030800
How many gallons are in my pool of 18′ X 30′10100118001350015100168001850020200
How many gallons are in my pool of 18′ X 33′11100130001480016700185002040022200
How many gallons are in my pool of 18′ X 36′12100141001610018200202002220024200
How many gallons are in my pool of 18′ X 39′13100153001750019700219002410026200
How many gallons are in my pool of 18′ X 42′14100165001880021200235002590028300
How many gallons are in my pool of 18′ X 45′15100177002020022700252002780030300
How many gallons are in my pool of 18′ X 48′16100188002150024200269002960032300
How many gallons are in my pool of 18′ X 52′17500204002330026200292003210035000
How many gallons are in my pool of 18′ X 55′18500216002470027800308003390037000
How many gallons are in my pool of 20′ X 30′11200131001500016800187002060022400
How many gallons are in my pool of 20′ X 33′12300144001640018500206002260024700
How many gallons are in my pool of 20′ X 36′13500157001790020200224002470026900
How many gallons are in my pool of 20′ X 39′14600170001940021900243002670029200
How many gallons are in my pool of 20′ X 42′15700183002090023500262002880031400
How many gallons are in my pool of 20′ X 45′16800196002240025200280003080033600
How many gallons are in my pool of 20′ X 48′17900209002390026900299003290035900
How many gallons are in my pool of 20′ X 52′19400227002590029200324003560038900
How many gallons are in my pool of 20′ X 55′20600240002740030800343003770041100
How many gallons are in my pool of 21′ X 30′11800137001570017700196002160023500
How many gallons are in my pool of 21′ X 33′13000151001730019400216002370025900
How many gallons are in my pool of 21′ X 36′14100165001880021200235002590028300
How many gallons are in my pool of 21′ X 39′15300179002040023000255002810030600
How many gallons are in my pool of 21′ X 42′16500192002200024700275003020033000
How many gallons are in my pool of 21′ X 45′17700206002350026500294003240035300
How many gallons are in my pool of 21′ X 48′18800220002510028300314003450037700
How many gallons are in my pool of 21′ X 52′20400238002720030600340003740040800
How many gallons are in my pool of 21′ X 55′21600252002880032400360003960043200
How many gallons are in my pool of 24′ X 30′13500157001790020200224002470026900
How many gallons are in my pool of 24′ X 33′14800173001970022200247002710029600
How many gallons are in my pool of 24′ X 36′16100188002150024200269002960032300
How many gallons are in my pool of 24′ X 39′17500204002330026200292003210035000
How many gallons are in my pool of 24′ X 42′18800220002510028300314003450037700
How many gallons are in my pool of 24′ X 45′20200235002690030300336003700040400
How many gallons are in my pool of 24′ X 48′21500251002870032300359003950043100
How many gallons are in my pool of 24′ X 52′23300272003110035000389004280046700
How many gallons are in my pool of 24′ X 55′24700288003290037000411004520049300
How many gallons are in my pool of 25′ X 30′14000164001870021000234002570028000
How many gallons are in my pool of 25′ X 33′15400180002060023100257002830030800
How many gallons are in my pool of 25′ X 36′16800196002240025200280003080033600
How many gallons are in my pool of 25′ X 39′18200213002430027300304003340036400
How many gallons are in my pool of 25′ X 42′19600229002620029400327003600039200
How many gallons are in my pool of 25′ X 45′21000245002800031500350003850042100
How many gallons are in my pool of 25′ X 48′22400262002990033600374004110044900
How many gallons are in my pool of 25′ X 52′24300283003240036400405004450048600
How many gallons are in my pool of 25′ X 55′25700300003430038500428004710051400

B – Circular Pool

US Gallons

SizeDepth 3′Depth 3.5′Depth 4′Depth 4.5′Depth 5′Depth 5.5′Depth 6′
how many gallons are in my 10′ round pool1800210023002600290032003500
how many gallons are in my 11′ round pool2100250028003200360039004300
how many gallons are in my 12′ round pool2500300034003800420047005100
how many gallons are in my 13′ round pool3000350040004500500055006000
how many gallons are in my 14′ round pool3500400046005200580063006900
how many gallons are in my 15′ round pool4000460053005900660073007900
how many gallons are in my 16′ round pool4500530060006800750083009000
how many gallons are in my 17′ round pool51005900680076008500930010200
how many gallons are in my 18′ round pool570067007600860095001050011400
how many gallons are in my 19′ round pool6400740085009500106001170012700
how many gallons are in my 20′ round pool70008200940010600117001290014100
how many gallons are in my 21′ round pool780091001040011700129001420015500
how many gallons are in my 22′ round pool850099001140012800142001560017100
how many gallons are in my 23′ round pool9300109001240014000155001710018600
how many gallons are in my 24′ round pool10100118001350015200169001860020300
how many gallons are in my 25′ round pool11000128001470016500183002020022000

Imperial Gallons

SizeDepth 3′Depth 3.5′Depth 4′Depth 4.5′Depth 5′Depth 5.5′Depth 6′
how many gallons are in my 10′ round pool1500170020002200240027002900
how many gallons are in my 11′ round pool1800210024002700300033003600
how many gallons are in my 12′ round pool2100250028003200350039004200
how many gallons are in my 13′ round pool2500290033003700410045005000
how many gallons are in my 14′ round pool2900340038004300480053005800
how many gallons are in my 15′ round pool3300390044005000550061006600
how many gallons are in my 16′ round pool3800440050005600630069007500
how many gallons are in my 17′ round pool4200490057006400710078008500
how many gallons are in my 18′ round pool4800550063007100790087009500
how many gallons are in my 19′ round pool53006200710079008800970010600
how many gallons are in my 20′ round pool590068007800880098001080011700
how many gallons are in my 21′ round pool6500750086009700108001190012900
how many gallons are in my 22′ round pool71008300950010700118001300014200
how many gallons are in my 23′ round pool780091001030011600129001420015500
how many gallons are in my 24′ round pool850099001130012700141001550016900
how many gallons are in my 25′ round pool9200107001220013800153001680018300

Summary

  • Pool gallons can be calculated in 3 different ways
  • 1 Cubic Foot = 7.48 US Gallons
  • 1 Cubic Foot = 6.23 Imperial Gallons
  • 1 Cubic meter = 264.17 US Gallons
  • 1 Cubic meter = 220 Imperial gallons

If you have any questions or suggestions about this post please comment.

If you want to convert the volume unit into another unit then click here.

if you want to learn about gallon measurement then click here.

Leave a Comment

Your email address will not be published.