*Air density decreases with increasing altitude and temperature. At sea level and 15°C, it’s roughly 1.225 kg/m³. At 10,000 feet and -5°C, it’s about 0.905 kg/m³. At 35,000 feet and -55°C, it’s approximately 0.331 kg/m³. These values are estimates based on standard atmospheric conditions and lapse rates.*

## Air Density Calculator Altitude and Temperature

**Air Density:** kg/m³

Altitude (Feet) | Altitude (Meters) | Temperature (°C) | Air Density (kg/m³) |
---|---|---|---|

Sea Level | 0 | 15 | 1.225 |

5,000 | 1,524 | 5 | ~1.111 |

10,000 | 3,048 | -5 | ~0.905 |

15,000 | 4,572 | -15 | ~0.746 |

20,000 | 6,096 | -25 | ~0.615 |

25,000 | 7,620 | -35 | ~0.505 |

30,000 | 9,144 | -45 | ~0.411 |

35,000 | 10,668 | -55 | ~0.331 |

## FAQs

**How to calculate air density at a given altitude and temperature?** Air density can be calculated using the ideal gas law: **ρ = P / (R * T)**, where **ρ** is air density, **P** is pressure, **R** is the specific gas constant for dry air, and **T** is temperature in Kelvin. You’ll also need to account for altitude to calculate pressure correctly.

**How is density related to altitude and temperature?** As altitude increases, air density decreases due to lower pressure. Temperature also affects density; warmer air is less dense than colder air.

**What is the density of air at 27 degrees Celsius?** At 27°C, air density is roughly **1.164 kg/m³**.

**What is the density of air at 25 degrees Celsius?** At 25°C, air density is approximately **1.184 kg/m³**.

**What is the density of air at 20 degrees Celsius?** At 20°C, air density is approximately **1.204 kg/m³**.

**What is the density of air in kg/m³ at altitude?** The density of air at a specific altitude can be calculated using the ideal gas law as mentioned earlier.

**How do I calculate density altitude?** Density altitude is calculated using pressure altitude and temperature. The formula is **Density Altitude = Pressure Altitude + [(Standard Temperature at Sea Level – Actual Temperature) / Temperature Lapse Rate]**, where the standard temperature lapse rate is roughly **1.98°C per 1,000 feet**.

**Does density altitude increase or decrease with temperature?** Density altitude increases with higher temperatures because warmer air is less dense.

**What is the density of air at 35°C?** At 35°C, air density is approximately **1.112 kg/m³**.

**What is the density of air at 32 degrees?** At 32°C, air density is roughly **1.127 kg/m³**.

**What is the density of air at 60 degrees Celsius?** At 60°C, air density is approximately **0.986 kg/m³**.

**What is the density of air at 15 degrees Celsius?** At 15°C, air density is roughly **1.225 kg/m³**.

**What is the density of air at 25 degrees Celsius in kg/m³?** At 25°C, air density is approximately **1.184 kg/m³**.

**What is the density of air at 20 degrees Celsius in kg/m³?** At 20°C, air density is approximately **1.204 kg/m³**.

**Which is more dense, air that is 90 degrees or air that is 40 degrees?** Air at 40°C is more dense than air at 90°C.

**What is the density of air at 21°C?** At 21°C, air density is roughly **1.217 kg/m³**.

**How much does air density change with temperature?** Air density decreases by about 2% for every 10°C increase in temperature.

**How does air density vary with altitude?** Air density decreases with increasing altitude due to the decrease in pressure.

**Why is cold air more dense?** Cold air is denser because the molecules are closer together at lower temperatures, resulting in higher density.

**What is the density of air at 15 km altitude?** At 15 km altitude, air density is approximately **0.297 kg/m³**.

**How do you find density altitude in the UK?** The calculation of density altitude is not specific to the UK; you can use the formula mentioned earlier regardless of location.

**What is the rule of thumb for density altitude?** A rule of thumb is that for every 1000-foot increase in density altitude, aircraft performance decreases by roughly 1%.

**How do you calculate temperature with altitude?** Temperature decreases with increasing altitude at a standard lapse rate of approximately 1.98°C per 1,000 feet.

**What is the density of air at 5,000 feet?** Air density at 5,000 feet depends on the temperature, but it’s roughly around **0.946 kg/m³**.

**How do you calculate air pressure at altitude?** Air pressure decreases with increasing altitude at a rate of about 1 inch of mercury (inHg) per 1,000 feet of altitude.

**What is the density of air in kg/cm³?** Air density is approximately **0.0012 kg/cm³**.

**Is air more dense at higher altitudes?** No, air is less dense at higher altitudes due to decreasing pressure.

**What is the formula for true altitude?** True altitude can be calculated using the pressure altitude and a correction factor based on the local atmospheric pressure.

**Does density increase with higher altitude?** No, density decreases with higher altitude due to lower pressure.

**What is the formula for air?** The formula for air density is **ρ = P / (R * T)**, as mentioned earlier.

**What is the standard temperature for air density?** The standard temperature for air density calculations is typically taken as 15°C at sea level.

**Does air pressure increase with altitude?** No, air pressure decreases with increasing altitude.

**What is the density of air at 35°C and 101 kPa?** At 35°C and 101 kPa, air density is approximately **1.048 kg/m³**.

**What is the density of air at 25°C and 100 kPa?** At 25°C and 100 kPa, air density is approximately **1.134 kg/m³**.

**What is the density of air at 25°C in g/cm³?** At 25°C, air density is roughly **0.001134 g/cm³**.

**Is warm air heavier than cold air?** No, warm air is lighter than cold air because it is less dense.

**Is warm air thicker than cold air?** No, warm air is less dense, so it is thinner than cold air.

**Which is heavier, cold or hot air?** Cold air is heavier than hot air because it is denser.

**What is the density of the atmosphere at sea level?** The density of the atmosphere at sea level is approximately **1.2 kg/m³**.

**Is air less dense in hot weather?** Yes, air is less dense in hot weather due to the higher temperatures.

**Which temperature of air is less dense?** Higher temperatures result in less dense air.

**How much denser is air in winter?** Air is denser in winter due to colder temperatures.

**Does low pressure mean cold?** Not necessarily. Low pressure systems can occur in both cold and warm weather conditions.

**What is the density of air at 5,000 meters?** Air density at 5,000 meters depends on the temperature but is roughly around **0.588 kg/m³**.

**Does air get thinner when it’s cold?** Yes, air becomes thinner (less dense) when it gets colder.

**Is the air thicker at night?** Air density remains relatively constant at night but may cool down, making it denser.

**Does warm air sink or rise?** Warm air tends to rise because it is less dense than its surroundings. This phenomenon is responsible for convection and the formation of clouds and weather patterns.

**Why do pilots calculate density altitude?** Pilots calculate density altitude to assess aircraft performance, especially in high-altitude or high-temperature conditions, as it affects takeoff, climb, and landing capabilities.

**What is the density of air at 400 km altitude?** At 400 km altitude, air density is extremely low and close to the vacuum of space, nearly **0 kg/m³**.

**What does QNH and QFE stand for?** QNH is the altimeter setting adjusted to sea level pressure, while QFE is the altimeter setting adjusted to the pressure at a specific location.

**What is the standard temperature for density altitude?** The standard temperature for density altitude calculations is typically 15°C at sea level.

**How do you calculate altitude with QNH?** Altitude can be calculated using QNH by adjusting the altimeter setting to sea level pressure and then reading the indicated altitude.

**What is the 10 21 rule in aviation?** The “10 21” rule in aviation refers to the estimate that for every 10°C increase in temperature above standard, the aircraft’s takeoff distance increases by 21%.

**What is the maximum altitude before space?** The boundary between Earth’s atmosphere and space is known as the Kármán line, which is approximately 100 kilometers (62 miles) above sea level.

**What is the rule of thumb for temperature altitude?** The rule of thumb is that temperature decreases by approximately 2°C for every 1,000 feet of altitude gain in the troposphere.

**How cold is the air at 35,000 feet?** The air at 35,000 feet is typically extremely cold, with temperatures around -50°C to -60°C (-58°F to -76°F).

**What is the air temperature at 10,000 feet?** The air temperature at 10,000 feet varies but can be estimated to be around -40°C to -50°C (-40°F to -58°F).

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