quantcalc

10 listings we've seen · as of 8 Oct 2026. This is the maker name shown on the store, not proof of who owns the company.

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Monte Carlo portfolio stress test: 100 simulated markets for your allocation — median, bad-case outcome and drawdowns.

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RMD calculator for 2026: your required minimum distribution from the IRS Uniform and Joint Life tables. Ages 73-120.

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Side hustle tax calculator 2026: tax on 1099 gig income alongside a W-2 job, and the quarterly payment that avoids the penalty.

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Roth conversion tax calculator 2026: tax on a conversion, pro-rata rule for backdoor Roth, and the IRMAA surcharge it can trigger.

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Capital gains tax calculator 2026: federal tax on a sale, 0% bracket room (up to $49,450 single) and the 3.8% NIIT.

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Paycheck calculator 2026: take-home pay per paycheck after federal tax and FICA, plus a W-4 check from last year's refund.

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Monte Carlo retirement calculator: will your savings last? Success rate and fan chart from 100 simulated markets.

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FIRE calculator: your FIRE number and retirement age in today's dollars, plus the 2026 ACA subsidy cliff before Medicare.

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1099 tax calculator for freelancers, 2026: self-employment tax, quarterly estimated payments, Solo 401(k) and SEP-IRA room.

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Retirement savings calculator: project your 401(k)/IRA balance and check it against the 2026 limits ($24,500 401k, $7,500 IRA).