CalcAngel
Free calculators and tools for work, home and life.
CalcAngel is a free collection of calculators and tools for work, home and life, giving you instant, clearly explained answers to everyday questions about money, materials, dates, health and more. There is no sign-up, no clutter and no waiting, just quick results whenever you need them.
The library is organised into practical categories, including pricing and margins, tax and VAT, salary and take-home pay, freelancer and contractor rates, marketing and growth, finance and invoicing, e-commerce selling, construction and DIY materials, dates, deadlines and time, health and fitness, and everyday conversions.
What sets CalcAngel apart is clarity. Every calculator does more than spit out a number; it explains the answer in plain language, so you understand not just the result but how it was reached and what it means for your decision.
It is especially handy for freelancers, small businesses and tradespeople who need dependable figures fast, whether that is working out a day rate, checking a margin, estimating materials for a job, or calculating VAT before sending an invoice.
Because the tools are free and require no account, they are always ready when a quick, trustworthy calculation would save time or prevent a costly mistake. Calculators can also be embedded on your own website to add useful functionality for your visitors.
Explore CalcAngel whenever you want a fast, clearly explained answer to a practical question, without the hassle of spreadsheets or guesswork.
How CalcAngel works
Free calculators and tools for work, home and life — instant, clearly explained answers.
Find the calculator you need
Browse by category or search — from profit margins and take-home pay to concrete, paint and pregnancy due dates.
Enter your figures
Straightforward inputs with sensible defaults. No sign-up, no paywall, nothing to install.
Get an instant, explained answer
Results appear as you type — and each one is clearly explained, so you can see how the number was reached.
Embed it on your own site
Add any calculator to your website with a copy-paste embed, free for registered domains. The maths runs on our servers, so your page stays fast and always up to date.
Calculators currently available
60 calculators across 12 categories, with more added regularly.
Pricing & Margins
4- Break-Even Calculator
- Discount Calculator
- Markup Calculator
- Profit Margin Calculator
Tax & VAT
1- VAT Calculator
Salary & Take-Home Pay
9- Compare Two Salaries Calculator
- Overtime Pay Calculator
- Pay Rise Calculator
- Pro-Rata Salary Calculator
- Required Salary Calculator
- Salary & Take-Home Pay Calculator
- Salary Converter (Hourly ⇄ Annual)
- Statutory Maternity Pay (SMP) Calculator
- Statutory Sick Pay (SSP) Calculator
Freelancer & Contractor Rates
4- Billable Utilisation Calculator
- Contractor Day Rate Calculator
- Freelance Hourly Rate Calculator
- Project Pricing Calculator
Marketing & Growth
4- Customer Acquisition Cost Calculator
- Customer Lifetime Value Calculator
- Revenue Growth Calculator
- ROAS Calculator
Finance & Invoicing
3- Business Loan Repayment Calculator
- Invoice Late Fee Calculator
- Sales Commission Calculator
E-commerce Selling
8- Average Order Value Calculator
- Break-Even ROAS Calculator
- Discount Profitability Calculator
- Influencer ROI Calculator
- Product Margin Calculator
- Profit After Fees Calculator
- Return Rate Impact Calculator
- Volumetric Shipping Weight Calculator
Construction & DIY Materials
11- Brick Calculator
- Concrete Calculator
- Decking Calculator
- Fencing Calculator
- Flooring Calculator
- Gravel Calculator
- Mulch Calculator
- Paint Calculator
- Roofing Calculator
- Tile Calculator
- Wallpaper Calculator
Dates, Deadlines & Time
8- Add or Subtract Days Calculator
- Age Calculator
- Business Days Calculator
- Countdown Calculator
- Days Between Dates Calculator
- Time Zone Meeting Planner
- Week Number Calculator
- Working Hours Calculator
Health & Fitness
5- BMI Calculator
- Body Fat Calculator
- Ideal Weight Calculator
- Pregnancy Due Date Calculator
- Running Pace Calculator
Everyday Conversions
1- Clothing Size Converter
Generators & Random Tools
2- Password Generator
- Random Number Generator