Finance Tools — Fynlo Labs

CalcTool —
18 Free Calculators.

Every number your business will ever need, instantly.

A complete set of interactive finance calculators built for business owners and individuals who need accurate numbers fast. No account. No ads. No waiting. Just the maths.

Open CalcTool → ← Back to Labs
Live at calctool.co.uk
18 calculators
Free, no sign-up required
Indexed on Google
What it is
Finance maths that just works.

CalcTool is a free, browser-based finance calculator suite covering the calculations that come up most often in business and personal finance. Built to be fast, accurate, and usable by anyone — whether you are a business owner checking your margins or an individual comparing mortgage deals.

Every calculator gives instant results as you type. No page reloads, no waiting, no sign-up walls.

All 18 Calculators
01
Mortgage Repayment
02
VAT Calculator
03
ROI Calculator
04
Loan Repayment
05
Compound Interest
06
Stamp Duty (SDLT)
07
Corporation Tax
08
Profit Margin
09
Break-Even Point
10
Payback Period
11
Net Present Value
12
Currency Converter
13
Salary to Hourly
14
Income Tax (UK)
15
National Insurance
16
Depreciation
17
Dividend Tax
18
Cash Flow Forecast
Built With
💻
Vanilla JS
🎨
Custom CSS
Netlify
🔍
Google Search Console

Want a custom calculator or finance tool?

We build bespoke interactive tools for businesses. Embed them anywhere, fully branded to you.

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