🌍 Orbital Period Calculator

Calculate orbital period using Kepler's Third Law: T² = a³. Free astronomy calculator.

Semi-Major Axis (AU — Astronomical Units)

1 AU = distance from Earth to Sun (149.6 million km)

Orbital Period (Years)

1.0000 years

Orbital Period (Days)

365.3 days

Kepler's Third Law: T² = a³ → T = a^1.5 (where T in Earth years, a in AU)

Solar System Planets

Mercury0.387 AU0.241 years

Venus0.723 AU0.615 years

Earth1 AU1 years

Mars1.524 AU1.881 years

Jupiter5.203 AU11.86 years

Saturn9.537 AU29.46 years

Uranus19.19 AU84.01 years

Neptune30.07 AU164.8 years

FAQ

Quick answers about using orbital period calculator on WoHoTech.

Orbital Period Calculator helps you complete this task instantly online without needing extra software or complex setup.

Open the tool, enter the required values or text, review the instant output, and then copy or use the result as needed.

Yes. Orbital Period Calculator is available as a public WoHoTech utility tool for fast browser-based use.