Astronomical unit to Planck Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert astronomical units [au] to planck length [lP] or planck length [lP] to astronomical units [au]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert astronomical units to planck length
There are two simple ways to convert astronomical units [au] to planck length [lP]. In the first calculation method, the value in astronomical units [au] is divided by the rounded conversion factor of 1.08 * 10-46. The second method multiplies the value in astronomical units [au] by the rounded conversion factor of 9.256 * 1045.
- Planck length [lP] ≈ astronomical units [au] ÷ (1.08 * 10-46)
- Planck length [lP] ≈ astronomical units [au] * 9.256 * 1045
However, rounded conversion values are only suitable for rough conversions, as rounding errors can occur in the calculation result. The most accurate conversion of astronomical units [au] to planck length [lP] can be achieved using the following calculation method.
- Planck length [lP] = astronomical units [au] ÷ 1,616.255 * 23,367 * 64,021 * 1040
Convert planck length to astronomical units
Converting planck length [lP] to astronomical units [au] is easy and can be done in two ways. The first method involves multiplication, in which the value in planck length [lP] is multiplied by the rounded conversion factor of 1.08 * 10-46. The second variant is a division. Here, the value in planck length [lP] is divided by the rounded conversion factor of 9.256 * 1045.
- Astronomical units [au] ≈ planck length [lP] * 1.08 * 10-46
- Astronomical units [au] ≈ planck length [lP] ÷ (9.256 * 1045)
However, rounded conversion values do not allow for exact calculations because rounding errors can occur in the calculation result. The most accurate conversion of planck length [lP] to astronomical units [au] can be achieved using the following calculation method.
- Astronomical units [au] = planck length [lP] * 1,616.255 ÷ 23,367 ÷ 64,021 ÷ 1040
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