Flow Rate Conversion Chart: m³/h, L/s, gpm, cfm

Flow rate conversion chart: L/h, L/min, L/s, m³/h, m³/s, cfm, ft³/s, US and UK gpm and bbl/d equivalents, with common values such as 10 m³/h or 100 gpm.

For reference. Verify the application conditions and the applicable standard.

Visible rows: 50

Unit equivalents

Flow rate conversion chart
From	L/h	L/min	L/s	m³/h	m³/min	m³/s	cfm	ft³/s	gpm (US)	gpm (UK)	bbl/d
	Equals, in the unit of the column
1 L/h	1	0.01666667	0.0002777778	0.001	0.00001666667	2.777778×10⁻⁷	0.0005885778	9.80963×10⁻⁶	0.004402868	0.003666154	0.1509555
1 L/min	60	1	0.01666667	0.06	0.001	0.00001666667	0.03531467	0.0005885778	0.2641721	0.2199692	9.057328
1 L/s	3600	60	1	3.6	0.06	0.001	2.11888	0.03531467	15.85032	13.19815	543.4397
1 m³/h	1000	16.66667	0.2777778	1	0.01666667	0.0002777778	0.5885778	0.00980963	4.402868	3.666154	150.9555
1 m³/min	60000	1000	16.66667	60	1	0.01666667	35.31467	0.5885778	264.1721	219.9692	9057.328
1 m³/s	3600000	60000	1000	3600	60	1	2118.88	35.31467	15850.32	13198.15	543439.7
1 cfm	1699.011	28.31685	0.4719474	1.699011	0.02831685	0.0004719474	1	0.01666667	7.480519	6.228835	256.475
1 ft³/s	101940.6	1699.011	28.31685	101.9406	1.699011	0.02831685	60	1	448.8312	373.7301	15388.5
1 gpm (US)	227.1247	3.785412	0.0630902	0.2271247	0.003785412	0.0000630902	0.1336806	0.002228009	1	0.8326742	34.28571
1 gpm (UK)	272.7654	4.54609	0.07576817	0.2727654	0.00454609	0.00007576817	0.1605437	0.002675728	1.20095	1	41.17543
1 bbl/d	6.624471	0.1104078	0.001840131	0.006624471	0.0001104078	1.840131×10⁻⁶	0.003899016	0.0000649836	0.02916667	0.02428633	1

Common values

Common values
From	L/h	L/min	L/s	m³/h	m³/min	m³/s	cfm	ft³/s	gpm (US)	gpm (UK)	bbl/d
	Equals, in the unit of the column
1 m³/h	1000	16.66667	0.2777778	1	0.01666667	0.0002777778	0.5885778	0.00980963	4.402868	3.666154	150.9555
2 m³/h	2000	33.33333	0.5555556	2	0.03333333	0.0005555556	1.177156	0.01961926	8.805735	7.332308	301.9109
5 m³/h	5000	83.33333	1.388889	5	0.08333333	0.001388889	2.942889	0.04904815	22.01434	18.33077	754.7773
10 m³/h	10000	166.6667	2.777778	10	0.1666667	0.002777778	5.885778	0.0980963	44.02868	36.66154	1509.555
20 m³/h	20000	333.3333	5.555556	20	0.3333333	0.005555556	11.77156	0.1961926	88.05735	73.32308	3019.109
50 m³/h	50000	833.3333	13.88889	50	0.8333333	0.01388889	29.42889	0.4904815	220.1434	183.3077	7547.773
100 m³/h	100000	1666.667	27.77778	100	1.666667	0.02777778	58.85778	0.980963	440.2868	366.6154	15095.55
200 m³/h	200000	3333.333	55.55556	200	3.333333	0.05555556	117.7156	1.961926	880.5735	733.2308	30191.09
500 m³/h	500000	8333.333	138.8889	500	8.333333	0.1388889	294.2889	4.904815	2201.434	1833.077	75477.73
1000 m³/h	1000000	16666.67	277.7778	1000	16.66667	0.2777778	588.5778	9.80963	4402.868	3666.154	150955.5
1 L/s	3600	60	1	3.6	0.06	0.001	2.11888	0.03531467	15.85032	13.19815	543.4397
2 L/s	7200	120	2	7.2	0.12	0.002	4.23776	0.07062933	31.70065	26.39631	1086.879
5 L/s	18000	300	5	18	0.3	0.005	10.5944	0.1765733	79.25162	65.99077	2717.198
10 L/s	36000	600	10	36	0.6	0.01	21.1888	0.3531467	158.5032	131.9815	5434.397
20 L/s	72000	1200	20	72	1.2	0.02	42.3776	0.7062933	317.0065	263.9631	10868.79
50 L/s	180000	3000	50	180	3	0.05	105.944	1.765733	792.5162	659.9077	27171.98
100 L/s	360000	6000	100	360	6	0.1	211.888	3.531467	1585.032	1319.815	54343.97
1 L/min	60	1	0.01666667	0.06	0.001	0.00001666667	0.03531467	0.0005885778	0.2641721	0.2199692	9.057328
5 L/min	300	5	0.08333333	0.3	0.005	0.00008333333	0.1765733	0.002942889	1.32086	1.099846	45.28664
10 L/min	600	10	0.1666667	0.6	0.01	0.0001666667	0.3531467	0.005885778	2.641721	2.199692	90.57328
20 L/min	1200	20	0.3333333	1.2	0.02	0.0003333333	0.7062933	0.01177156	5.283441	4.399385	181.1466
50 L/min	3000	50	0.8333333	3	0.05	0.0008333333	1.765733	0.02942889	13.2086	10.99846	452.8664
100 L/min	6000	100	1.666667	6	0.1	0.001666667	3.531467	0.05885778	26.41721	21.99692	905.7328
1 gpm (US)	227.1247	3.785412	0.0630902	0.2271247	0.003785412	0.0000630902	0.1336806	0.002228009	1	0.8326742	34.28571
2 gpm (US)	454.2494	7.570824	0.1261804	0.4542494	0.007570824	0.0001261804	0.2673611	0.004456019	2	1.665348	68.57143
5 gpm (US)	1135.624	18.92706	0.315451	1.135624	0.01892706	0.000315451	0.6684028	0.01114005	5	4.163371	171.4286
10 gpm (US)	2271.247	37.85412	0.630902	2.271247	0.03785412	0.000630902	1.336806	0.02228009	10	8.326742	342.8571
20 gpm (US)	4542.494	75.70824	1.261804	4.542494	0.07570824	0.001261804	2.673611	0.04456019	20	16.65348	685.7143
50 gpm (US)	11356.24	189.2706	3.15451	11.35624	0.1892706	0.00315451	6.684028	0.1114005	50	41.63371	1714.286
100 gpm (US)	22712.47	378.5412	6.30902	22.71247	0.3785412	0.00630902	13.36806	0.2228009	100	83.26742	3428.571
200 gpm (US)	45424.94	757.0824	12.61804	45.42494	0.7570824	0.01261804	26.73611	0.4456019	200	166.5348	6857.143
500 gpm (US)	113562.4	1892.706	31.5451	113.5624	1.892706	0.0315451	66.84028	1.114005	500	416.3371	17142.86
1000 gpm (US)	227124.7	3785.412	63.0902	227.1247	3.785412	0.0630902	133.6806	2.228009	1000	832.6742	34285.71
100 cfm	169901.1	2831.685	47.19474	169.9011	2.831685	0.04719474	100	1.666667	748.0519	622.8835	25647.5
200 cfm	339802.2	5663.369	94.38949	339.8022	5.663369	0.09438949	200	3.333333	1496.104	1245.767	51294.99
500 cfm	849505.4	14158.42	235.9737	849.5054	14.15842	0.2359737	500	8.333333	3740.26	3114.418	128237.5
1000 cfm	1699011	28316.85	471.9474	1699.011	28.31685	0.4719474	1000	16.66667	7480.519	6228.835	256475
2000 cfm	3398022	56633.69	943.8949	3398.022	56.63369	0.9438949	2000	33.33333	14961.04	12457.67	512949.9
5000 cfm	8495054	141584.2	2359.737	8495.054	141.5842	2.359737	5000	83.33333	37402.6	31144.18	1282375

Quick answers

1 L/min = 0.06 m³/h = 0.01666667 L/s. View in table
1 cfm = 1.699011 m³/h = 0.4719474 L/s. View in table
1 ft³/s = 101.9406 m³/h = 28.31685 L/s. View in table
1 gpm (US) = 0.2271247 m³/h = 0.0630902 L/s. View in table
1 gpm (UK) = 0.2727654 m³/h = 0.07576817 L/s. View in table
1 bbl/d = 0.006624471 m³/h = 0.001840131 L/s. View in table

Conditions and notes

Conversion between volumetric flow rate units only. Factors are exact definitions and displayed numbers are rounded to 7 significant digits.

gpm (US) rests on the 231 in³ gallon and gpm (UK) on the 4.54609 L gallon. They differ by about 20 percent.
cfm is cubic foot per minute. An air flow depends on the conditions (temperature, pressure), and this chart only converts the unit.
Mass flow rate (kg/s, t/h) depends on the density and is not in this chart.

Each row is a starting value. The columns show the same volumetric flow rate in the other units. For example, the 1 gpm (US) row gives about 0.2271 in the m³/h column. The shaded diagonal cells are the unit itself. The common values section below reads typical flow rates such as 10 m³/h, 100 gpm or 1000 cfm at a glance.

Gpm rests on the US gallon, and the UK gallon has its own column. The two differ by about 20 percent. cfm is common for air flow and gpm for water flow. Petroleum barrel per day (bbl/d) is used in oil production.

This chart converts volumetric flow rate. Mass flow rate needs the density, which is a separate calculation.

Sources

This table is for preliminary reference. Check the applicable standard and product conditions before use.

Source 1. SP 811:2008. Accessed: 2026-10-16
Source 2. SP 811:2008. Accessed: 2026-10-16
Source 3. HB 44:2026. Accessed: 2026-10-16
Source 4. UKPGA 1985 C 72. Accessed: 2026-10-16

Data version: 2026-10-16