Section II · 148 tools
Calculators.
Mortgages, loans, interest, taxes, retirement, health, math, and the rest. Every tool computes in arbitrary precision and links its formula in plain language.
148 calculators in finance
Cell Phone Plan Cost Calculator
Estimate your total monthly or annual cell phone bill by entering plan details, lines, overages, device payments, and state wireless tax rates.
50/30/20 Rule Budget Calculator
Calculate your 50/30/20 budget split instantly. Enter after-tax income and pay frequency to see your needs, wants, and savings targets.
Income Tax Calculator 2025
Estimate your 2025 federal and state income tax in seconds. Enter gross income, filing status, and state to calculate total tax liability and effective rate.
Hours Pay Calculator
Compute gross wages from regular and overtime hours worked. Automatically enforces FLSA rules and your state's minimum wage floor.
Auto Loan Payment Calculator
Calculate monthly auto loan payments instantly. Enter vehicle price, APR, loan term, down payment, and trade-in value to see exact monthly costs and total interest.
Trump Tariff Cost Calculator
Calculate Trump administration import tariff costs by country, product category, declared value, and quantity—with empirical consumer pass-through rates.
Hourly To Salary With Overtime Calculator
Convert hourly wages to annual salary with overtime included. Uses FLSA overtime standards to calculate your accurate gross yearly income.
Addiction Cost Calculator (Lifetime Opportunity Cost)
Calculate the lifetime opportunity cost of addiction. Enter your substance, daily use, and years to see how much money could have grown if invested instead.
Merchant Cash Advance (Mca) Calculator
Calculate merchant cash advance payments by entering advance amount, factor rate, estimated term, and payment frequency to see per-period cost and total repayment.
70/20/10 Rule Money Calculator
Calculate your 70/20/10 budget: allocate 70% to needs, 20% to savings, and 10% to wants from your monthly after-tax income.
Money Per Hour Calculator (Salary To Hourly)
Convert any annual salary to an hourly rate in seconds, factoring in overtime, bonuses, unpaid time off, and after-tax take-home pay.
Lottery Tax Calculator
Estimate after-tax lottery winnings by entering your jackpot, payout type (lump sum or annuity), and state. Calculates federal and state taxes instantly.