To convert tonne force to kilonewtons, multiply by 9.80665.
The calculation uses 1 tf = 9.80665 kN. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
The formula
value in kN = value in tf × 9.80665
tf- Input unit: tonne force
kN- Output unit: kilonewtons
How to use this calculator
- Enter a value in tf.
- Multiply by the stored conversion factor.
- Read the result in kN; divide by the same factor to convert back.
Worked examples
Worked conversion
1 tf × 9.80665 ≈ 9.80665 kN.
Reverse conversion
9.80665 kN ÷ 9.80665 ≈ 1 tf. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 9.80665 kN per tf.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
tf to kN table
| tf | kN (rounded) |
|---|---|
| 0 | 0 |
| 1 | 9.80665 |
| 2 | 19.6133 |
| 5 | 49.03325 |
| 10 | 98.0665 |
| 100 | 980.665 |
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