Tax
Loan, savings, investing and planning calculators using standard amortization mathematics, transparent assumptions and cited conventions.
Tax Calculator
Estimate income tax using US 2026 federal brackets or UK 2026-27 bands. See tax due, after-tax income, and effective rate. Educational reference only.
Capital Gains Tax Calculator
Estimate US capital gains tax on an investment sale. Long-term 2025 brackets (single filer) or short-term at your ordinary rate. Educational only.
VAT Calculator
Add VAT to a net price or remove VAT from a gross price at any rate. Reverse-VAT formula net = gross ÷ (1 + rate), with worked examples.
GST Calculator
Add or remove GST at 5%, 12%, 18% or 28% (India), 10% (Australia) or 15% (New Zealand). Shows the CGST/SGST split for intra-state supplies.
Sales Tax Calculator
Add sales tax to a pre-tax price, or work backwards to extract the tax already included in a total. Handles any state and local combined rate.