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Skylight Size Calculator
Size skylights as a share of floor area for daylight.
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Skylight
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Size skylights as a share of floor area for daylight.
Skylight Size Estimator
Enter your numbers below for an instant estimate.
0
π‘ Tip: Daylight rule of thumb.
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
Skylight Quick Guide
Typical values for reference.
| Floor m2 | Target % | Spare | Glass m2 |
|---|---|---|---|
| 10 | 10 | – | 1.00 |
| 20 | 10 | – | 2.00 |
| 30 | 12 | – | 3.60 |
| 50 | 8 | – | 4.00 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Skylight Size Calculator FAQ
Answers to common questions about this calculator.
Percent of floor.
It gives a quick estimate of skylight size 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.