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Calcimator

Planetary Transit Calculator

Calculate transit depth, duration, probability, and timing for exoplanet transits.

Inputs

Solar Radii
Earth Radii
days
AU
degrees

Results

Transit Depth

0.000001

Transit Duration

12.98 hours

Transit Probability

0.00465%

Impact Parameter0
Ingress Duration0.0005 days
Orbital Velocity29,785.68 m/s

Transit Depth

0.000001

Transit Duration

12.98 hours

Transit Probability

0.00465%

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Star Radius — Radius of the host star Accepts values from 0.1 Solar Radii to 1,000 Solar Radii (default: 1 Solar Radii).
  3. Planet Radius — Radius of the transiting planet Accepts values from 0.01 Earth Radii to 10 Earth Radii (default: 0.1 Earth Radii).
  4. Orbital Period — Orbital period of the planet Accepts values from 0.1 days to 10,000 days (default: 365.25 days).
  5. Semi-Major Axis — Average orbital distance Accepts values from 0.01 AU to 100 AU (default: 1 AU).
  6. Orbital Inclination — Orbital inclination (90° = edge-on) Accepts values from 0 degrees to 90 degrees (default: 90 degrees).
  7. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  8. Transit Depth — shown as a numeric value. This is the primary result of this calculator.
  9. Transit Duration — shown as a numeric value. This is the primary result of this calculator.
  10. Transit Probability — shown as a percentage. This is the primary result of this calculator.
  11. Impact Parameter — shown as a numeric value.
  12. Ingress Duration — shown as a numeric value.
  13. Orbital Velocity — shown as a numeric value.
  14. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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Formula

Transit Depth = (R_planet / R_star)²

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