Liter per Hour to Milliliter per Second (LPH to mL/s)
Convert LPH to mL/s — Flow Rate converter
One liter per hour equals 0.27777778 mL/s, so to convert liters per hour to milliliters per second you multiply the value by 0.27777778. A liter per hour is smaller than a milliliter per second — going the other way, 1 mL/s = 3.6 LPH. For example, 10 LPH = 2.777778 mL/s and 50 LPH = 13.888889 mL/s.
1 LPH = 0.27777778 mL/s
Liter per Hour to Milliliter per Second formula
1 Liter per Hour = 0.27777778 mL/s
Worked examples
- 25 LPH = 6.944444 mL/s
- 100 LPH = 27.777778 mL/s
Liter per Hour to Milliliter per Second conversion table
| Liter per Hour (LPH) | Milliliter per Second (mL/s) |
|---|---|
| 1 | 0.27777778 |
| 2 | 0.55555556 |
| 3 | 0.83333333 |
| 5 | 1.388889 |
| 8 | 2.222222 |
| 10 | 2.777778 |
| 12 | 3.333333 |
| 15 | 4.166667 |
| 20 | 5.555556 |
| 25 | 6.944444 |
| 50 | 13.888889 |
| 100 | 27.777778 |
| 250 | 69.444444 |
| 500 | 138.888889 |
| 1000 | 277.777778 |
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 LPH = 0.27777778 mL/s.
Frequently asked questions
How many milliliters per second are in one liter per hour?
One liter per hour equals 0.27777778 milliliters per second (mL/s).
How many liters per hour are in one milliliter per second?
One milliliter per second equals 3.6 liters per hour (LPH).
How do you convert liters per hour to milliliters per second?
1 Liter per Hour = 0.27777778 mL/s. Use the calculator above for any value.
What is 5 LPH in mL/s?
5 LPH = 1.388889 mL/s.
What is 100 LPH in mL/s?
100 LPH = 27.777778 mL/s.
What is 10 LPH in mL/s?
10 LPH = 2.777778 mL/s.
What is 20 LPH in mL/s?
20 LPH = 5.555556 mL/s.
What is 50 LPH in mL/s?
50 LPH = 13.888889 mL/s.
What is 500 LPH in mL/s?
500 LPH = 138.888889 mL/s.
Is a liter per hour bigger than a milliliter per second?
No. A liter per hour is smaller — one liter per hour equals 0.27777778 milliliters per second, while one milliliter per second equals 3.6 liters per hour.