Earth-Moon distance (Apollo)
Calculate Earth-Moon distance (Apollo) instantly with the exact formula and a worked example.
Earth-Moon distance (Apollo)
Laser pulse round-trip times
Distance to the Moon
384,379km
Difference from the 384,400 km mean
-21km
One-way time
1.2821s
Earth radii
60.33
More about: Earth-Moon distance (Apollo)
What it calculates
The “Earth-Moon distance (Apollo)” calculator computes Distance to the Moon in km from 1 parameter: laser pulse round-trip time (s).
An astronomy calculation for enthusiasts and scientists.
Example calculation
With parameters Laser pulse round-trip time = 2.56 s the result is 384,379 km (From the telescope to the retroreflector on the lunar surface, without atmospheric corrections).
How to use
- Enter laser pulse round-trip time — each field above is adjustable with a slider.
- Distance to the Moon (km) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
Related calculators
FAQ
How is Earth-Moon distance (Apollo) calculated?
The Earth-Moon distance (Apollo) calculator computes Distance to the Moon (in km) from laser pulse round-trip time. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Earth-Moon distance (Apollo) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
More calculators in this category
Explore related free tools