All calculators
Every calculator, grouped by category.
Construction
- Concrete CalculatorWork out how much concrete you need for a slab, base or footing.
- Screed CalculatorWork out how much floor screed you need for a room.
- Ballast CalculatorWork out the ballast and cement needed to mix your own concrete.
- Sand and Cement CalculatorWork out the sand and cement needed for a volume of 4:1 mortar.
- Brick CalculatorWork out how many bricks you need for a wall.
- Plasterboard CalculatorWork out how many plasterboard sheets you need for a wall or ceiling.
- Tarmac CalculatorWork out how many tonnes of tarmac you need for a drive or path.
- Roof Pitch CalculatorFind your roof pitch in degrees and as a ratio from the rise and run.
- Paving CalculatorWork out how many paving slabs you need.
- Stud Wall CalculatorWork out how many vertical studs your wall needs.
Home Improvement
- Tile CalculatorWork out how many tiles you need for a wall or floor.
- Flooring CalculatorWork out how much flooring you need for a room.
- Paint CalculatorWork out how much paint you need for your walls.
- Carpet CalculatorWork out how much carpet you need for a room.
- Insulation CalculatorWork out how many insulation boards or rolls you need.
Garden & Landscaping
- Decking CalculatorWork out how many decking boards you need for your deck.
- Patio CalculatorWork out how many paving slabs you need for your patio.
- Gravel CalculatorWork out how much gravel you need for a drive, path or border.
- Topsoil CalculatorWork out how much topsoil you need for a bed, lawn or border.
- Turf CalculatorWork out how many rolls of turf you need for your lawn.
Business & Marketing
- Markup CalculatorWork out the markup percentage between your cost price and selling price.
- Profit Margin CalculatorWork out your profit and profit margin from cost and selling price.
- Gross Profit CalculatorWork out gross profit and gross margin from revenue and cost of goods sold.
- ROI CalculatorWork out your return on investment from the amount invested and the amount returned.
- ROAS CalculatorWork out your return on ad spend from advertising spend and advertising revenue.
- CPM CalculatorWork out your cost per thousand impressions from advertising cost and impressions.
- CPC CalculatorWork out your cost per click from advertising cost and clicks.
- Conversion Rate CalculatorWork out your conversion rate from conversions and total visitors.
- Break Even CalculatorWork out how many units you need to sell to cover your fixed costs.
- Discount CalculatorWork out the discount amount and final price from a percentage off.
Time & Work
- Working Days CalculatorCount the Monday to Friday working days between two dates.
- Business Days CalculatorAdd or subtract business days from a date, skipping weekends.
- Overtime CalculatorWork out your overtime pay from your hourly rate, overtime hours and multiplier.
- Hourly to Salary CalculatorConvert an hourly rate into an annual salary.
- Hours CalculatorWork out the hours and minutes between a start time and an end time.
Money
- Mortgage Overpayment CalculatorSee how much interest and time you could save by overpaying your mortgage each month.
- Loan Overpayment CalculatorSee how much interest and time you could save by overpaying your loan each month.
- Savings CalculatorWork out what your savings could grow to with regular monthly contributions.
- Compound Interest CalculatorWork out what a lump sum grows to with compound interest.
- VAT CalculatorAdd VAT to a price or remove VAT from a VAT-inclusive price.
Motoring
Home & Energy
- U Value CalculatorWork out the U value of a wall or roof build-up from its layers.
- Heat Loss CalculatorEstimate the fabric heat loss from a room.
- Radiator Size CalculatorEstimate the radiator output a room needs in watts and BTU.
- Boiler Size CalculatorEstimate the boiler output your home needs in kW.
- Electricity Cost CalculatorWork out what an appliance costs to run.