One kilopascal is exactly 7500.616827 millitorr, so converting kilopascals to millitorr is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
The standard tyre-pressure unit in metric countries. One thousandth of a torr, the working unit of vacuum deposition.
Gauge versus absolute. A tyre gauge reading 32 psi means 32 psi above atmospheric, which is about 46.7 psi absolute. Converting the number is straightforward; remembering which zero it was measured from is where the mistakes happen. N/mm² and MPa are the same size, so a drawing quoting either is quoting the same stress. The tables underneath give both a plain step-by-step lookup and a list of real quantities expressed in millitorr, so you can sanity-check whether your answer is a plausible size.
The formula
kilopascals- The amount you are converting, in kilopascals
7500.61682704- The exact number of millitorr in one kilopascal
millitorr- The converted result
How it works, step by step
- Enter the value in kilopascals.
- It is multiplied by 7500.61682704, the exact factor between the two units.
- The answer is shown in millitorr, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A bicycle tyre: 621 kPa in millitorr
Take a bicycle tyre, roughly 621 kPa. The conversion is a single multiplication — 621 × 7500.62 — giving 4.65788e+06 mTorr. Because the relationship is proportional, doubling the input doubles the answer to 9.31577e+06 mTorr.
A steam boiler: 1000 kPa in millitorr
Take a steam boiler, roughly 1000 kPa. The conversion is a single multiplication — 1000 × 7500.62 — giving 7.50062e+06 mTorr. Because the relationship is proportional, doubling the input doubles the answer to 1.50012e+07 mTorr.
How to read your score
Frequently asked questions
How many millitorr are in one kilopascal?
Exactly 7500.61682704. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert kilopascals to millitorr?
millitorr = kilopascals × 7500.61682704. Reversed, kilopascals = millitorr ÷ 7500.61682704, which is the same as multiplying by 0.000133322368421.
Which is the bigger unit, the kilopascal or the millitorr?
The kilopascal. One kilopascal equals 7500.62 millitorr.
What does this quantity actually measure?
Both units measure pressure. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a kilopascal?
The standard tyre-pressure unit in metric countries.
What is a millitorr?
One thousandth of a torr, the working unit of vacuum deposition.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Is there a quick way to do kPa to mTorr in my head?
Plenty of people do this in their head: multiply by 7500 instead of using the exact factor 7500.616827. At 100 that shortcut gives 750,000 millitorr, off by 61.68 millitorr or about 0.01%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Kilopascals to millitorr reference tables
| Kilopascals | Millitorr |
|---|---|
| 0.5 kPa | 3750.31 mTorr |
| 1 kPa | 7500.62 mTorr |
| 2 kPa | 15,001.2 mTorr |
| 3 kPa | 22,501.9 mTorr |
| 5 kPa | 37,503.1 mTorr |
| 10 kPa | 75,006.2 mTorr |
| 20 kPa | 150,012 mTorr |
| 25 kPa | 187,515 mTorr |
| 50 kPa | 375,031 mTorr |
| 75 kPa | 562,546 mTorr |
| 100 kPa | 750,062 mTorr |
| 250 kPa | 1.87515e+06 mTorr |
| 500 kPa | 3.75031e+06 mTorr |
| 1000 kPa | 7.50062e+06 mTorr |
| 5000 kPa | 3.75031e+07 mTorr |
Exact factor: 1 kilopascal = 7500.61682704 millitorr.
| Quantity | kPa | mTorr |
|---|---|---|
| Sea-level air | 101.3 kPa | 7.6e+05 mTorr |
| A car tyre | 220.6 kPa | 1.655e+06 mTorr |
| Blood pressure, systolic | 16 kPa | 1.2e+05 mTorr |
| A bicycle tyre | 620.5 kPa | 4.654e+06 mTorr |
| A domestic water main | 400 kPa | 3e+06 mTorr |
| A steam boiler | 1000 kPa | 7.501e+06 mTorr |
Published reference values, converted with the same factor this page uses.