🪚 Woodwork Calculator – Free Online DIY Tool
Calculate timber and wood needed for your next carpentry project. 100% free, no sign-up required.
Total Timber Needed: 0 metres
Number of Pieces: 0
How to Use the Woodwork Calculator
The Woodwork Calculator is a simple yet essential tool designed to help you work out exactly how much timber you need for your next carpentry project. Whether you're building shelves, a table, a cabinet, or a picture frame, this tool takes the guesswork out of your project.
Step 1: Select your project type — shelving, table, cabinet, picture frame, or custom project.
Step 2: Enter the dimensions of your project.
Step 3: Enter the dimensions of your timber (width, thickness, and length per piece).
Step 4: Choose your wastage allowance.
Step 5: Click "Calculate Woodwork" and the tool will tell you exactly how much timber you need.
Why Use a Woodwork Calculator?
Timber can be expensive, and buying the wrong amount can be costly. Buying too much is a waste of money. Buying too little means delays while you wait for more stock.
This woodwork calculator helps you:
- Save money – buy exactly what you need
- Reduce waste – minimise leftover timber
- Plan your budget – know exactly how much your project will cost
- Avoid delays – buy everything you need in one trip
Whether you're a DIY enthusiast or a professional carpenter, this tool is essential for any woodworking project.
Understanding Timber Measurements
Timber is typically sold by the linear metre or per piece. The most common timber sizes in the UK are:
- Width: 75mm, 100mm, 150mm, 200mm
- Thickness: 18mm, 22mm, 25mm, 38mm, 44mm
- Length: 2.4m, 3.0m, 4.2m, 4.8m
When calculating how much timber you need, consider:
- Cutting waste – cuts and trims create waste
- Knots and defects – may need to cut around them
- Joining – joints require extra material
Always add a wastage allowance of at least 10% for cuts and mistakes.
How Much Timber Do I Need?
Here are some typical timber quantities for UK projects:
- Shelf (1m x 0.3m): 2.5m of timber per shelf
- Table (1.5m x 0.8m): 5-8m of timber
- Picture frame (0.5m x 0.4m): 1.8m of timber
- Cabinet (1m x 0.5m x 0.4m): 10-15m of timber
These are estimates – always use the woodwork calculator for an accurate measurement for your specific project.
Frequently Asked Questions
1. How do I calculate timber for a project?
Measure the length, width, and thickness needed for each component, add them together, then add wastage. Our calculator does this for you automatically.
2. How much timber do I need for a shelf?
A standard shelf needs timber equal to the shelf length plus a small allowance for cutting. For a 1m shelf, you need approximately 1.1m of timber.
3. What is the standard length of timber in the UK?
Standard timber lengths in the UK are 2.4m, 3.0m, 4.2m, and 4.8m.
4. How much wastage should I allow for woodwork?
10% is standard for most woodwork projects. Add more for complex projects or if you're a beginner.
5. What is the difference between softwood and hardwood?
Softwood comes from conifer trees and is cheaper and easier to work with. Hardwood comes from deciduous trees and is stronger and more expensive.
6. Should I buy extra timber for repairs?
Yes, it's recommended to keep spare timber for future repairs. Our calculator includes a wastage allowance.
7. Can I use this calculator for decking wood?
For decking-specific calculations, please use our dedicated Decking Calculator.
8. What if my project has multiple different sizes?
Use the custom project option and enter the total length and width of timber needed for all components combined.
Related Tools
If you found this woodwork calculator useful, you might also like these related DIY tools:
- Decking Calculator – calculate how many decking boards you need
- Skirting Calculator – calculate how much skirting you need
- Plaster Calculator – calculate plaster coverage
- Room Volume Calculator – calculate cubic metres of your room