Volumetric flow rate.
Teaspoon per Hours to Liters per Millisecond Converter — tsp/h to L/ms
Convert Teaspoon per Hours (tsp/h) to Liter per Millisecond (L/ms) using the exact conversion factor (1 teaspoon per hours = 1.369145e-9 liter per millisecond). See the formula, worked examples, and conversion table.
Teaspoon per Hours to Liters per Millisecond converter
Converter
Flow Rate Converter
Convert volumetric flow rates across metric, US, imperial, industrial, and scientific units.
Context values
Some unit families need one extra value for a physically accurate result.
Volumetric flow rate.
Result = input x 1.36914489e-9 / 1.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Teaspoon per Hours to Liters per Millisecond
Teaspoon per Hours and Liter per Millisecond both measure volumetric flow rate — how much volume passes a point over time — used to size pipes and pumps, monitor river or stream discharge, control industrial processes, and set medical infusion rates. Both are volumetric flow rate units.
Formula
liters per millisecond = teaspoon per hours × 1.369145e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 teaspoon per hours equals 1.369145e-9 base units, and 1 liter per millisecond equals 1 base unit, so dividing one by the other gives the direct teaspoon per hours-to-liter per millisecond factor of 1.369145e-9.
Simple example
1 tsp/h × 1.369145e-9 = 1.369145e-9 L/ms
1 teaspoon per hours = 1.369145e-9 liters per millisecond.
Real-world example
60 tsp/h × 1.369145e-9 = 8.214869e-8 L/ms
60 teaspoon per hours = 8.214869e-8 liters per millisecond.
Conversion table
| Teaspoon per Hours (tsp/h) | Liter per Millisecond (L/ms) |
|---|---|
| 0.1 tsp/h | 1.369145e-10 L/ms |
| 1 tsp/h | 1.369145e-9 L/ms |
| 10 tsp/h | 1.369145e-8 L/ms |
| 60 tsp/h | 8.214869e-8 L/ms |
| 100 tsp/h | 1.369145e-7 L/ms |
| 1,000 tsp/h | 0.0000013691 L/ms |
Reverse conversion: Liter per Millisecond to Teaspoon per Hours
1.369145e-9 L/ms × 730382890.4 = 1.000000082 tsp/h
1.369145e-9 liters per millisecond = 1.000000082 teaspoon per hours.
teaspoon per hours = liters per millisecond × 730382890.36
For a page dedicated to this direction, see Liter per Millisecond to Teaspoon per Hours.
Understanding the Teaspoon per Hours (tsp/h)
Volumetric flow rate.
Understanding the Liter per Millisecond (L/ms)
Volumetric flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many liters per millisecond are in 1 teaspoon per hours?
1 teaspoon per hours equals 1.369145e-9 liters per millisecond, using the exact defined conversion factor rather than an estimate.
How do I convert teaspoon per hours to liter per millisecond?
Multiply the teaspoon per hours value by 1.369145e-9. The converter above does this instantly to whatever precision you set.
How do I convert liter per millisecond back to teaspoon per hours?
Use the reverse factor: 1 liter per millisecond equals 730,382,890.4 teaspoon per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a teaspoon per hours?
Teaspoon per Hours (tsp/h) is a unit of flow rate.
What is a liter per millisecond?
Liter per Millisecond (L/ms) is a unit of flow rate.
Is the teaspoon per hours to liter per millisecond conversion exact?
Yes. Both teaspoon per hours and liter per millisecond are defined by fixed standards rather than physical artifacts, so the factor of 1.369145e-9 used above is exact to as many digits as you choose to display.
What's the difference between volumetric and mass flow rate?
Volumetric flow rate measures the volume of fluid passing a point per unit time (for example, liters per second). Mass flow rate measures the mass instead. For a fluid of constant density the two are directly proportional, but for compressible fluids like gases, mass flow is often the more meaningful quantity.