CalcFlow — From red to green, one calculation at a time.
Loan Repayment
Monthly payment, total interest, amortisation table.
Mortgage
Repayment vs interest-only, overpayments, term changes.
Savings Growth
Compound interest with monthly contributions.
APR ↔ EAR
Convert between nominal APR and effective annual rate.
Take Home Pay
Estimate net pay from gross salary with PAYE, NI, pension, and Student Loan.
Stamp Duty Calculator
Instantly calculate SDLT, LBTT, or LTT for any UK property.
VAT Calculator
Add or remove VAT at 20%, 5%, or 0% with precise totals.
Mortgage Fee vs No Fee
Compare the true cost of paying a fee for a lower rate.
Popular Calculators
Get started in seconds
Pick a calculator, enter your numbers, and share a link to the results. That’s it.
Open calculators