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Roof Span Calculator
Calculate the roof span and ridge height from building width and pitch.
ruler Free Online Tool
⚡ Instant Results
📊 Clear Comparison
🔒 100% Free Tool
Ridge height
Compare Your Options And Get Clear Answers
Calculate the roof span and ridge height from building width and pitch.
Roof Span Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: Span equals wall to wall width.
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
Roof Quick Guide
Typical values for reference.
| Width | Pitch | Height | Rafter |
|---|---|---|---|
| 6 | 30 | 1.73 | 3.46 |
| 8 | 30 | 2.31 | 4.62 |
| 8 | 40 | 3.36 | 5.22 |
| 10 | 45 | 5.00 | 7.07 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Roof Span Calculator FAQ
Answers to common questions about this calculator.
Distance between supports.
It gives a quick estimate of roof span 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.