Feet to standard temperature
Type a value in ft to get it in °C (ISA) instantly.
That's 1.86× as high as Denver, the “Mile High City”, while La Paz, Bolivia is 1.21× higher. Standard pressure there is 701.2 hPa (69.2 % of sea level), and water boils at 90.03 °C.
What it means
How high is that?
International Standard Atmosphere (ISO 2533), from −610 m to 20 km. Real pressure varies with weather by a few percent; temperature is the standard one, valid up to 11 km.
The math
How to convert ft to °C (ISA)
Up to 11 km: p = 1013.25 × (1 − 2.25577×10⁻⁵ × h)^5.25588 hPa; above, p falls exponentially at −56.5 °C. Boiling point by the Antoine equation for water.
Example: 9,840 ft = -4.49501 °C (ISA).
Every unit
That altitude in every unit
Tables
ft to °C (ISA) conversion table
| ft | °C (ISA) |
|---|---|
| 0 ft | 15 °C (ISA) |
| 820 ft | 13.3754 °C (ISA) |
| 1,640 ft | 11.7508 °C (ISA) |
| 3,280 ft | 8.50166 °C (ISA) |
| 4,920 ft | 5.2525 °C (ISA) |
| 6,560 ft | 2.00333 °C (ISA) |
| 8,200 ft | -1.24584 °C (ISA) |
| 9,840 ft | -4.49501 °C (ISA) |
| 13,100 ft | -10.9537 °C (ISA) |
| 16,400 ft | -17.4917 °C (ISA) |
| 19,700 ft | -24.0296 °C (ISA) |
| 26,200 ft | -36.9074 °C (ISA) |
| 32,800 ft | -49.9834 °C (ISA) |
°C (ISA) to ft conversion table
| °C (ISA) | ft |
|---|---|
| -56.5 °C (ISA) | 36,089.2 ft |
| -50 °C (ISA) | 32,808.4 ft |
| -37 °C (ISA) | 26,246.7 ft |
| -24 °C (ISA) | 19,685 ft |
| -17.5 °C (ISA) | 16,404.2 ft |
| -11 °C (ISA) | 13,123.4 ft |
| -4.5 °C (ISA) | 9,842.52 ft |
| -1.25 °C (ISA) | 8,202.1 ft |
| 2 °C (ISA) | 6,561.68 ft |
| 5.25 °C (ISA) | 4,921.26 ft |
| 8.5 °C (ISA) | 3,280.84 ft |
| 11.8 °C (ISA) | 1,615.18 ft |
| 13.4 °C (ISA) | 807.591 ft |
| 15 °C (ISA) | 0 ft |
Quick answers
Quick answers
- How many °C (ISA) is 1 ft?
- 1 ft is 14.998 °C (ISA).
- How many °C (ISA) is 10 ft?
- 10 ft is 14.9802 °C (ISA).
- How many °C (ISA) is 9,840 ft?
- 9,840 ft is -4.49501 °C (ISA).
The units
About these units
Feet (ft)
Altitude in feet, as aviation uses.
Standard temperature (°C (ISA))
The standard air temperature at that height (troposphere only).
Keep going