Free calculators

Small calculators for everyday pricing and estimating questions. Type your own numbers and the answer updates as you go. Nothing you type leaves your browser.

• Break-even point calculator

  How many units you need to sell to cover your fixed costs, and what those sales come to, from three numbers: fixed costs, price and cost per unit.

• Markup vs margin calculator

  Turn a cost and a price into markup and margin, or find the price that gives the margin you want. Shows the gross profit on each unit too.

• Roofing squares and waste calculator

  Turn a roof footprint and pitch into roof area, roofing squares and shingle bundles, with a waste allowance added on.

• Paint quantity and cost calculator

  How many gallons of paint a room's walls need, how many to buy, and what they cost, from the room size, doors, windows and coats.

• Retainage calculator

  Work out the retainage held on a contract, the amount earned less retainage, what is due now and what is left to bill.

• Minimum service charge calculator

  Find the least to charge for any job, from your drive time, setup and cleanup time, hourly rate and the cost of each trip.