Toolkits by profession

The calculators one kind of work keeps reaching for, gathered in one place, each with the job it does there.

• ⌂Mortgage advisersMortgage repayments, overpayments, affordability, stamp duty and rent versus buy — the free calculators behind every mortgage conversation, in one place.
• £Accountants and bookkeepersTake-home pay, the cost of employing someone, redundancy pay, FICA and FUTA, margins and hourly rates — free calculators for the everyday sums of client work.
• %Small business ownersMarkup, profit margin, break-even, discounts, ROI, staff costs and timesheets — the free calculators that show whether a price, a sale or a hire pays.
• ↗SaaS foundersMRR, customer lifetime value, ROI, gross margin and break-even — free calculators for the subscription metrics that investors and lenders always ask about.
• ▦Builders and tradespeopleConcrete, bricks, blocks, tiles, paint, gravel and roof pitch — free calculators for the quantities to order for a job, so the first delivery is the right one.
• ⚙CNC machinistsSpeeds and feeds, carbide vs PCD cost per part, and the purchase and hourly running cost of a CNC lathe or mill — free calculators for the shop floor.
• ♥Personal trainersBMI, body fat, BMR, calories, macros, protein and running pace — free calculators for the estimates a client’s training and nutrition plan starts from.
• ÷Maths teachers and tutorsFractions, percentages, ratios, averages, quadratics, Pythagoras and the order of operations — free calculators to check an answer, most with the working shown.