JoinCalc is a free collection of financial calculators for US and UK users ā no sign-up, no ads interruption, all calculations happen in your browser. Includes: šļø Stamp Duty Calculator (UK 2026) š Capital Gains Tax (US & UK) š¦ Inheritance Tax (UK IHT & US Estate Tax) š„ FIRE Calculator š Mortgage Affordability š§ 401k & UK Pension Calculator š¼ Salary Take-Home (US, UK, CA, AU) š Loan Calculator š° Dividend Income š Compound Interest All rates updated for 2026.
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Maker
š
Hi Product Hunt! š
I built JoinCalc because I was frustrated with financial
calculators that were either paywalled, full of ads, or
outdated.
JoinCalc is completely free ā no sign-up, no paywalls,
all calculations happen in your browser so your data
stays private.
Would love your feedback on which calculator you find
most useful, and what I should build next!
ā joincalc.com