Gallon (US) per Hour to Milliliter per Second (gal/h to mL/s)
Convert gal/h to mL/s — Flow Rate converter
One gallon (US) per hour equals 1.051503 mL/s, so to convert gallons (US) per hour to milliliters per second you multiply the value by 1.051503. A gallon (US) per hour is larger than a milliliter per second — going the other way, 1 mL/s = 0.95101939 gal/h. For example, 10 gal/h = 10.515033 mL/s and 50 gal/h = 52.575164 mL/s.
1 gal/h = 1.051503 mL/s
Gallon (US) per Hour to Milliliter per Second formula
1 Gallon (US) per Hour = 1.051503 mL/s
Worked examples
- 25 gal/h = 26.287582 mL/s
- 100 gal/h = 105.150327 mL/s
Gallon (US) per Hour to Milliliter per Second conversion table
| Gallon (US) per Hour (gal/h) | Milliliter per Second (mL/s) |
|---|---|
| 1 | 1.051503 |
| 2 | 2.103007 |
| 3 | 3.15451 |
| 5 | 5.257516 |
| 8 | 8.412026 |
| 10 | 10.515033 |
| 12 | 12.618039 |
| 15 | 15.772549 |
| 20 | 21.030065 |
| 25 | 26.287582 |
| 50 | 52.575164 |
| 100 | 105.150327 |
| 250 | 262.875818 |
| 500 | 525.751637 |
| 1000 | 1051.5 |
Which gallon, and which trade
The single most expensive mistake in flow conversion is the gallon. A US liquid gallon is 3.785411784 litres; an imperial gallon is 4.54609 litres. US GPM and imperial GPM differ by about 20%, and pump datasheets frequently do not say which one they mean. Check the manufacturer's country of origin before trusting a GPM figure.
Different trades default to different units for the same physical quantity: HVAC and compressed air work in CFM, plumbing and pumps in GPM or LPM, and process and water engineering in m³/h or L/s. A specification that mixes them is usually quoting different equipment, not different flows. On this page, 1 gal/h = 1.051503 mL/s.
Frequently asked questions
How many milliliters per second are in one gallon (US) per hour?
One gallon (US) per hour equals 1.051503 milliliters per second (mL/s).
How many gallons (US) per hour are in one milliliter per second?
One milliliter per second equals 0.95101939 gallons (US) per hour (gal/h).
How do you convert gallons (US) per hour to milliliters per second?
1 Gallon (US) per Hour = 1.051503 mL/s. Use the calculator above for any value.
What is 5 gal/h in mL/s?
5 gal/h = 5.257516 mL/s.
What is 100 gal/h in mL/s?
100 gal/h = 105.150327 mL/s.
What is 10 gal/h in mL/s?
10 gal/h = 10.515033 mL/s.
What is 20 gal/h in mL/s?
20 gal/h = 21.030065 mL/s.
What is 50 gal/h in mL/s?
50 gal/h = 52.575164 mL/s.
What is 500 gal/h in mL/s?
500 gal/h = 525.751637 mL/s.
Is a gallon (US) per hour bigger than a milliliter per second?
Yes. A gallon (US) per hour is larger — one gallon (US) per hour equals 1.051503 milliliters per second (mL/s).