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Flow Rate Calculator

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With this tool, it is possible to easily calculate the average volumetric flow rate of fluids by changing each of the three variables: length, pressure and bore diameter. The effects on the predicted flow rate are then given in three graphs, where in turn two of the variables are kept constant and the flow rate is plotted against a range of values of the third.

Find this tool useful? You can embed our Flow Rate Calculator into your own website by copying the code below.

How to Use:

To begin calculating, enter your figures in the boxes below. If a value is not available for any one of the variables, then please leave the field blank and the program will select its own value.

Bore Diameter (mm)

Pressure (Bar)

Length (Metres)

Results

Please click on the tabs below to view the results.

Quantity Fluid Flow vs Hose Length Quantity Fluid Flow vs Pressure Quantity Fluid Flow vs Bore Diameter

Quantity Fluid Flow vs Hose Length Data
Length	20.000	40.000	60.000	80.000	100.000	120.000	140.000	160.000	180.000	200.000
Quantity Fluid Flow (litres per minute)	95.273	68.458	56.202	48.807	43.727	39.961	37.026	34.656	32.689	31.023
Bore Diameter (mm)	25	25	25	25	25	25	25	25	25	25
Pressure (bar)	7	7	7	7	7	7	7	7	7	7
Bore Diameter (ins)	0.984	0.984	0.984	0.984	0.984	0.984	0.984	0.984	0.984	0.984
Pressure (psi)	102.900	102.900	102.900	102.900	102.900	102.900	102.900	102.900	102.900	102.900
Length (feet)	65.667	131.333	197.000	262.667	328.333	394.000	459.667	525.333	591.000	656.667
Quantity Fluid Flow (gallons per minute)	20.960	15.061	12.364	10.738	9.620	8.791	8.146	7.624	7.192	6.825
Coefficient C	20.105	20.105	20.105	20.105	20.105	20.105	20.105	20.105	20.105	20.105
Velocity V( ft/sec)	10.602	7.618	6.254	5.431	4.866	4.447	4.120	3.856	3.638	3.452
Bore Diameter (ft) D	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021
EquivTtl head fluid h (ft)	237.644	237.644	237.644	237.644	237.644	237.644	237.644	237.644	237.644	237.644

Quantity Fluid Flow vs Pressure Data
Pressure	1.400	2.800	4.200	5.600	7.000	8.400	9.800	11.200	12.600	14.000
Qty fluid flow (ltrs/min)	19.555	27.655	33.871	39.110	43.727	47.900	51.738	55.310	58.666	61.839
Bore dia (mm)	25	25	25	25	25	25	25	25	25	25
Length	100	100	100	100	100	100	100	100	100	100
Bore dia (ins)	0.984	0.984	0.984	0.984	0.984	0.984	0.984	0.984	0.984	0.984
Pressure (psi)	20.580	41.160	61.740	82.320	102.900	123.480	144.060	164.640	185.220	205.800
Length (ft)	328.333	328.333	328.333	328.333	328.333	328.333	328.333	328.333	328.333	328.333
Qty fluid flow (gals/min)	4.302	6.084	7.452	8.604	9.620	10.538	11.382	12.168	12.906	13.605
Coefficient C	20.105	20.105	20.105	20.105	20.105	20.105	20.105	20.105	20.105	20.105
Velocity V( ft/sec)	2.176	3.077	3.769	4.352	4.866	5.330	5.757	6.155	6.528	6.881
Bore dia (ft) D	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021	0.082021
EquivTtl head fluid h (ft)	47.529	95.058	142.587	190.115	237.644	285.173	332.702	380.231	427.760	475.289

Quantity Fluid Flow vs Bore Diameter Data
Bore Diameter	5.000	10.000	15.000	20.000	25.000	30.000	35.000	40.000	45.000	50.000
Qty fluid flow (ltrs/min)	0.091	2.204	8.792	21.989	43.727	75.790	119.849	177.478	250.177	339.374
Pressure (bar)	7	7	7	7	7	7	7	7	7	7
Length	100	100	100	100	100	100	100	100	100	100
Bore dia (ins)	0.197	0.394	0.591	0.787	0.984	1.181	1.378	1.575	1.772	1.969
Pressure (psi)	102.900	102.900	102.900	102.900	102.900	102.900	102.900	102.900	102.900	102.900
Length (ft)	328.333	328.333	328.333	328.333	328.333	328.333	328.333	328.333	328.333	328.333
Qty fluid flow (gals/min)	0.020	0.485	1.934	4.838	9.620	16.674	26.367	39.045	55.039	74.662
Coefficient C	2.314	9.976	14.458	17.638	20.105	22.120	23.824	25.300	26.602	27.767
Velocity V( ft/sec)	0.252	1.533	2.718	3.823	4.866	5.857	6.804	7.715	8.592	9.441
Bore dia (ft) D	0.016	0.033	0.049	0.066	0.082	0.098	0.115	0.131	0.148	0.164
EquivTtl head fluid h (ft)	237.644	237.644	237.644	237.644	237.644	237.644	237.644	237.644	237.644	237.644

Embed this tool on your website

Copy the code below to embed the Flow Rate Calculator on your website.

<iframe style="width: 100%;min-height: 500px;border: 0;min-height: 710px;" src="https://copely.com/flow-rate-calculator-widget"></iframe>

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Flow Rate Calculator

How to Use:

Results

Embed this tool on your website