Free Tools
Free calculators and utilities we build for businesses and developers. No signup, no tracking — just answers.
Payment Tools
Fee calculators and cost comparisons for UK payment gateways — know exactly what processors take before you commit.
Stripe Fee Calculator
Work out exactly what Stripe charges per transaction — UK, EU, international and Amex cards. Includes monthly volume totals and a gross-up calculator.
PayPal Fee Calculator
Calculate PayPal processing fees for UK transactions — domestic, international, and micropayment rates. See your net amount instantly.
Finance & Tax Calculators
UK finance calculators for business owners — statutory interest, tax and invoice tools that do the maths HMRC won't.
Development & Hiring Tools
Estimators and rate calculators for software projects — app costs, contractor rates, and the true cost of hiring developers.
App Cost Estimator
How much does an app cost to build in the UK? Pick a platform, size and features for an instant estimate with timeline.
Developer Rate Calculator
Compare a contractor day rate against the true cost of hiring — NI, pension, recruitment and downtime included.
Maths Calculators
Percentages, fractions, statistics, base conversions and equation solvers — instant answers.
Health & Fitness Calculators
BMI, calories, macros, pregnancy dates and running pace — quick health maths.
Unit Converters
Length, weight, volume, temperature, speed and data-size conversions.
Everyday Calculators
Dates, tips, grades, passwords and other everyday utilities.
Need a Custom Tool Built?
We build calculators, estimators, and internal tools that generate leads and automate workflows for businesses in the UK and North America.