Tonnes-force to kilonewtons
Type a value in tf to get it in kN instantly.
1,176.798kN
That's 1.39× as much thrust as a Falcon 9 Merlin engine, while a Starship Raptor engine is 1.95× more. That is enough to hold up about 120,000 kg against gravity.
What it means
How much push is that?
Engine figures are typical published ratings; afterburning, altitude and throttle all change them. Rocket thrust is at sea level.
The math
How to convert tf to kN
To convert tonnes-force to kilonewtons, multiply by 9.80665.
Example: 120 tf × 9.80665 = 1,176.8 kN.
In the other direction, 1 kN = 0.101972 tf.
Thrust-to-weight below assumes Airliner, 70 t. Change it above and those figures update.
Every unit
Your thrust in every unit
Tables
tf to kN conversion table
| tf | kN |
|---|---|
| 1 tf | 9.80665 kN |
| 5 tf | 49.0333 kN |
| 10 tf | 98.0665 kN |
| 20 tf | 196.133 kN |
| 50 tf | 490.333 kN |
| 100 tf | 980.665 kN |
| 120 tf | 1,176.8 kN |
| 200 tf | 1,961.33 kN |
| 500 tf | 4,903.33 kN |
| 1,000 tf | 9,806.65 kN |
| 2,000 tf | 19,613.3 kN |
| 7,500 tf | 73,549.9 kN |
kN to tf conversion table
| kN | tf |
|---|---|
| 1 kN | 0.101972 tf |
| 5 kN | 0.509858 tf |
| 10 kN | 1.01972 tf |
| 20 kN | 2.03943 tf |
| 50 kN | 5.09858 tf |
| 100 kN | 10.1972 tf |
| 120 kN | 12.2366 tf |
| 200 kN | 20.3943 tf |
| 500 kN | 50.9858 tf |
| 1,000 kN | 101.972 tf |
| 2,000 kN | 203.943 tf |
| 7,500 kN | 764.787 tf |
Quick answers
Quick answers
- How many kN is 1 tf?
- 1 tf is 9.80665 kN.
- How many kN is 10 tf?
- 10 tf is 98.0665 kN.
- How many kN is 120 tf?
- 120 tf is 1,176.8 kN.
The units
About these units
Tonnes-force (tf)
Used for rockets: a tonne-force lifts a tonne.
Kilonewtons (kN)
How jet engines are rated outside the US.
Keep going