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Snells Law Calculator
Calculate the refracted angle with Snell law.
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Refracted angle
Compare Your Options And Get Clear Answers
Calculate the refracted angle with Snell law.
Snells Law Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: Air 1.00, water 1.33, glass 1.5.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Snells Quick Guide
Typical values for reference.
| n1 | n2 | Incident | Refracted |
|---|---|---|---|
| 1 | 1.33 | 30 | 22.08 |
| 1 | 1.5 | 30 | 19.47 |
| 1 | 1.5 | 60 | 35.26 |
| 1.5 | 1 | 30 | 48.59 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Snells Law Calculator FAQ
Answers to common questions about this calculator.
Refraction.
It gives a quick estimate of snells law from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.