Categories › Software Development › Converters, validators, encoders & small utilities
Tested financial & practical calculators as free, no-auth MCP tools for AI agents.
Remote server: your requests and data go to calcfleet.com. Claude Code: claude mcp add --transport http calculators https://calcfleet.com/api/mcp · Claude app: Settings → Connectors → Add custom connector.
The tools this server listed when we connected to it, in its own words.
mortgage_overpayment_calculator — Mortgage Overpayment Calculator — See exactly how much interest and time you save by overpaying your mortgage. Instant amortization scheduledebt_payoff_calculator — Debt Payoff Calculator: Avalanche vs Snowball — Compare the avalanche and snowball debt payoff strategies side by side. See how much interesfreelance_hourly_rate_calculator — Freelance Hourly Rate Calculator — Calculate your freelance hourly rate accounting for taxes, business expenses, and a profit margin. Find ocompound_interest_calculator — Compound Interest Calculator — Calculate compound interest with monthly contributions. See your balance grow year by year and discover exactsavings_goal_calculator — Savings Goal Calculator — Calculate the monthly savings you need to reach any goal. Input your target, current balance, annual rate, and yeacar_loan_calculator — Car Loan Calculator with Sales Tax and Trade-In — Calculate your exact monthly car payment including sales tax and trade-in. View your full break_even_calculator — Break-Even Point Calculator — Calculate your break-even point in units and revenue. Enter fixed costs, variable cost per unit, and price to margin_markup_calculator — Margin and Markup Calculator — Calculate gross profit, margin percentage, and markup percentage instantly. Enter cost and price to see the rrent_vs_buy_calculator — Rent vs Buy Calculator — Compare renting vs buying over any timeline. See which builds more wealth, when break-even hits, and how appreciatifire_calculator — FIRE Calculator: When Can You Retire Early? — Calculate your FIRE number and years to early retirement. Enter current savings, annual expenstake_home_pay_calculator — Take-Home Pay Calculator (US) — Estimate your US take-home pay for 2026. Enter gross salary and filing status to see federal income tax, Socstudent_loan_calculator — Student Loan Payoff Calculator — See exactly how many months until you pay off your student loans, how much extra payments save in interest,apy_calculator — APY Calculator: APR to APY Conversion — Convert your nominal rate (APR) to APY instantly. See how compounding frequency—daily, monthly, or qroi_calculator — ROI Calculator with Annualized Return — Calculate ROI and annualized return on any investment. Add fees and costs to see true net gain and tloan_amortization_calculator — Loan Amortization Calculator — Get your full loan amortization schedule instantly. See how each payment splits between interest and principapaint_calculator — Paint Calculator: How Much Paint Do I Need? — Calculate exactly how much paint you need for any room. Enter room dimensions, number of coatsmortgage_refinance_calculator — Mortgage Refinance Calculator — Find out if refinancing your mortgage is worth it. Compare monthly payments, see when you break even, and sptdee_calculator — TDEE Calculator: Daily Calorie Needs — Calculate your Total Daily Energy Expenditure (TDEE) using the Mifflin-St Jeor formula. Find your daimacro_calculator — Macro Calculator: Protein, Carbs and Fat Targets — Calculate your daily protein, carb, and fat targets from your calorie goal. Choose a presrunning_pace_calculator — Running Pace Calculator with Race Predictions — Calculate your per-km and per-mile running pace from any distance and time. Get predicted firent_affordability_calculator — Rent Affordability Calculator — Find out how much rent you can afford using the 30% rule, 50/30/20 budget, and a cashflow stress test. All tclosing_cost_calculator — Mortgage Closing Cost Estimator — Estimate US mortgage closing costs before you buy. See itemized origination, appraisal, title, and prepaidmortgage_points_calculator — Mortgage Discount Points Break-Even Calculator — Find out if buying mortgage discount points is worth it. See the break-even month and net ghome_affordability_calculator — Home Affordability Calculator — Find out how much house you can afford using the 28/36 DTI rule. Enter income, rate, and debts to get your mdown_payment_calculator — Down Payment Calculator with PMI Threshold — Calculate your down payment amount, loan size, and PMI status instantly. See the dollar gap to mortgage_piti_calculator — Mortgage PITI Calculator — Calculate your full monthly PITI mortgage payment—principal, interest, property taxes, homeowners insurance, and balance_transfer_calculator — Balance Transfer Calculator — See how much a 0% balance transfer saves vs staying on your current APR. Enter the fee, promo months, and planheloc_calculator — HELOC Payment Calculator (Draw + Repayment) — Calculate your HELOC draw and repayment payments. See the payment shock when interest-only swidebt_consolidation_calculator — Debt Consolidation Calculator — See how your current debts compare against one new consolidation loan. A lower rate with a longer term can scredit_card_payoff_calculator — Credit Card Payoff Calculator — Find out how many months until your credit card is paid off — and how the minimum-payment trap costs you decpersonal_loan_calculator — Personal Loan Calculator with APR & Amortization — Calculate your personal loan monthly payment, total interest, and true effective APR incldti_calculator — Debt-to-Income (DTI) Ratio Calculator — Calculate your front-end and back-end debt-to-income ratio instantly. See how your debt load comparesaas_mrr_growth_calculator — SaaS MRR Growth Projection Calculator — Model SaaS MRR growth with monthly compounding: add new revenue, subtract churn, apply expansion. Secac_ltv_calculator — CAC : LTV Ratio Calculator — Calculate Customer Lifetime Value, LTV:CAC ratio with poor/fair/good/excellent verdict bands, CAC payback monthroas_calculator — ROAS & Break-Even ROAS Calculator — Calculate ROAS and break-even ROAS instantly. Enter revenue, ad spend, and gross margin to see if your cchurn_rate_calculator — Churn & Retention Rate Calculator — Calculate monthly and annual customer churn, revenue churn, and net revenue retention. Compounding convepayback_period_calculator — CAC Payback Period Calculator — Calculate your CAC payback period with simple and discounted methods. Find the month your customer acquisitiburn_rate_runway_calculator — Burn Rate & Runway Calculator — Calculate startup burn rate and cash runway. Gross vs net burn, default alive or dead verdict, and month-by-product_pricing_calculator — Product Pricing Calculator — Set the right selling price for your product. Enter fully-loaded unit cost — materials, labor, overhead, and plsales_tax_calculator — US Sales Tax Calculator (by State) + Reverse — Calculate US sales tax by state. Add or strip tax from any price. Select a state to prefill tNot tested by KitScout yet. When our harness runs it, pros, cons and the tasks we tried appear here, with the date and evidence.