Finance Tools
GST, VAT, sales tax, discount, profit margin, markup, compound interest, loan and mortgage calculators. Estimates only — verify with a professional.
GST Calculator
Calculate GST inclusive and exclusive amounts.
VAT Calculator
Calculate VAT inclusive and exclusive amounts.
Sales Tax Calculator
Calculate sales tax on a purchase amount.
Discount Calculator
Calculate the final price after a percentage discount.
Profit Margin Calculator
Calculate gross profit margin from revenue and cost.
Markup Calculator
Calculate the markup percentage from cost and selling price.
Compound Interest Calculator
Calculate compound interest over time.
Loan Calculator
Estimate monthly loan payments and total interest.
Mortgage Calculator
Estimate monthly mortgage repayments.
Percentage Calculator
Calculate percentages, increases and decreases.
Tip Calculator
Split a bill and calculate tips per person.
Retirement Calculator
Estimate how much you need to save for retirement.
Inflation Calculator
See how purchasing power changes with inflation.
FIRE Calculator
Calculate when you can retire early (FIRE).
Mortgage Comparison
Compare multiple mortgage offers side by side.
Loan Payoff Simulator
Simulate early loan payoff strategies.
Freelancer Tax Estimator
Estimate self-employment tax for freelancers.
Currency Margin Calculator
Calculate margin on currency exchange.
Invoice Due Date Tracker
Calculate invoice due dates from payment terms.
Subscription Cost Tracker
Track and total your subscription costs.
Scientific Calculator
Advanced scientific calculator with trigonometry, logarithms, symbolic algebra, and step-by-step solutions. TI-89 inspired.
Graphing Calculator
Plot and analyze mathematical functions with zoom, pan, and multi-function overlay. Interactive graphing in your browser.