Instant · Precise · Universal
34 units available
6 categories total
To convert to kilograms: multiply by 9.80665.
1 kgf·s²/m = 9.80665 kg (exactly), based on standard gravity g₀ = 9.80665 m/s².
For example, 1 Kilogram-force second²/meter (kgf·s²/m) = 9.806650e-9 Teragram (Tg).
| Kilogram-force second²/meter (kgf·s²/m) | Teragram (Tg) |
|---|---|
| 0.1 | 9.806650e-10 |
| 0.5 | 4.903325e-9 |
| 1 | 9.806650e-9 |
| 2 | 1.961330e-8 |
| 5 | 4.903325e-8 |
| 10 | 9.806650e-8 |
| 25 | 2.451662e-7 |
| 50 | 4.903325e-7 |
| 100 | 9.806650e-7 |
| 500 | 0.000004903325 |
| 1000 | 0.00000980665 |
The kilogram-force second squared per meter is an engineering unit of mass in the gravitational metric system, equal to about 9.807 kg.
1 kgf·s²/m = 9.80665 kg (exactly), based on standard gravity g₀ = 9.80665 m/s².
To convert to kilograms: multiply by 9.80665.
Historical engineering calculations where force was in kgf and F=ma needed consistent units.
This unit is the metric equivalent of the slug (imperial system). Just as 1 lb-force accelerates 1 slug at 1 ft/s², 1 kgf accelerates this unit at 1 m/s².
Mixing up mass (kg) and weight (kgf) in the gravitational system. SI removed this confusion by using newtons for force.
This unit exists because the gravitational system used kgf (force) as base, so a derived mass unit was needed for F=ma to work.
The teragram equals 10¹² grams or one million tonnes (one megatonne).
1 Tg = 10¹² g = 10⁹ kg = 10⁶ tonnes = 1 megatonne.
To convert Tg to tonnes: multiply by 10⁶. To convert Tg to Gg: multiply by 1,000.
Global carbon budgets (~10,000 Tg C/year from fossil fuels), volcanic eruption plume masses.
Earth's atmosphere has a total mass of about 5.15 × 10⁶ Tg (5.15 × 10¹⁸ kg).
Confusing Tg with Pg (petagram): 1 Pg = 1,000 Tg. Climate papers use both — check carefully.
Global CO₂ emissions ≈ 36,000 Tg/year (or 36 Pg/year). This is a key climate number to remember.



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