How much do I need? Find out in seconds.
Free, accurate calculators for home & garden projects — paint, tile, flooring, mulch, soil and gravel. No sign-up, instant results, in metric or imperial.
Home & Interior
Paint, wallpaper, tile, flooring, drywall and AC sizing — get the indoor numbers right before you buy.
Paint Calculator
How much paint to buy for a room or set of walls.
Open calculator →Wallpaper Calculator
How many rolls of wallpaper for a room.
Open calculator →Tile Calculator
How many tiles you need for a floor or wall, with waste.
Open calculator →Flooring Calculator
Boxes of laminate, vinyl or hardwood flooring to buy.
Open calculator →Drywall Calculator
Sheets of drywall for walls and ceilings.
Open calculator →Air Conditioner BTU Calculator
What size (BTU) air conditioner a room needs.
Open calculator →Garden & Outdoor
Mulch, soil, grass seed and gravel for beds, lawns, paths and driveways.
Mulch Calculator
Cubic yards or bags of mulch for your beds.
Open calculator →Raised Bed Soil Calculator
Litres, bags or cubic feet of soil to fill raised beds.
Open calculator →Grass Seed Calculator
How much grass seed for a new lawn or overseeding.
Open calculator →Gravel Calculator
Cubic yards and tons of gravel, stone or sand.
Open calculator →Building & Structures
Concrete, pavers, fencing and decking for bigger outdoor builds.
Concrete Calculator
Cubic yards and bags of concrete for a slab.
Open calculator →Paver Calculator
Pavers plus base gravel and bedding sand for a patio.
Open calculator →Fence Calculator
Posts, rails and pickets for a fence run.
Open calculator →Deck Board Calculator
How many deck boards for a deck of any size.
Open calculator →Why DIY Tally
Built to answer one question well: exactly how much material to buy.
Accurate, not guesswork
Real formulas with sensible waste and coverage built in — sized so you buy the right amount.
Metric & imperial
Switch between feet/inches and metres/centimetres with one tap. Your figures convert automatically.
No sign-up, instant
No account, no email, no app. Type your measurements and see the answer immediately.
Know what to order
We translate volumes into bags, boxes, tins and tons — the way suppliers actually sell.
Project guides
Short, practical reads that pair with the calculators.
How to measure a room for any project
Get the measurements right once and every material estimate falls into place. Here is the simple method the pros use.
Read guide →Bulk vs bags: buying mulch, soil, gravel and concrete
Bagged is convenient; bulk is cheaper past a surprisingly low threshold. Here is where the line is for each material.
Read guide →Waste allowance: how much extra material to buy
The single most common reason DIYers run short. Here is how much extra to buy for tile, flooring, decking and pavers — and why.
Read guide →Stop guessing how much to buy
Nearly every home and garden project starts with the same question — how much do I need? Buy too little and you lose an afternoon driving back to the store, often to find a slightly different batch of paint or a discontinued tile. Buy too much and money sits unused in the garage. DIY Tally exists to make that number exact.
Each calculator uses the real formula a tradesperson would, with practical allowances for waste, coverage and compaction. Then it does the part most calculators skip: it converts the raw volume into the units suppliers actually sell — bags of mulch, boxes of flooring, tins of paint, tons of gravel — so you can order with confidence.
Everything is free, works on your phone at the store, and needs no sign-up. Pick a calculator to get started:
- Paint Calculator — How much paint to buy for a room or set of walls.
- Wallpaper Calculator — How many rolls of wallpaper for a room.
- Tile Calculator — How many tiles you need for a floor or wall, with waste.
- Flooring Calculator — Boxes of laminate, vinyl or hardwood flooring to buy.
- Drywall Calculator — Sheets of drywall for walls and ceilings.
- Air Conditioner BTU Calculator — What size (BTU) air conditioner a room needs.
- Mulch Calculator — Cubic yards or bags of mulch for your beds.
- Raised Bed Soil Calculator — Litres, bags or cubic feet of soil to fill raised beds.
- Grass Seed Calculator — How much grass seed for a new lawn or overseeding.
- Gravel Calculator — Cubic yards and tons of gravel, stone or sand.
- Concrete Calculator — Cubic yards and bags of concrete for a slab.
- Paver Calculator — Pavers plus base gravel and bedding sand for a patio.
- Fence Calculator — Posts, rails and pickets for a fence run.
- Deck Board Calculator — How many deck boards for a deck of any size.