Fast, private calculators for commissions, mortgages, car payments, loans, percentages, and unit conversions.
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Verify quota attainment, OTE, accelerators, and payout math. Enter your comp plan — we compute what you should be paid and flag any gap versus the company-stated payout.
Quota attainment = actual sales ÷ quota.
Flat rate: commission = actual sales × commission rate.
Quota-based: commission = variable target × attainment.
Accelerator: variable target × attainment up to 100%, plus sales above quota × accelerator rate.
Total gross pay = base salary + expected commission. All figures assume the same measurement period (typically annual) and are pre-tax.
Estimate your full monthly payment — principal & interest, property taxes, insurance, HOA, and PMI — plus total interest over the life of the loan.
Principal & interest uses the standard amortization formula: M = P × r(1+r)ⁿ ÷ ((1+r)ⁿ − 1), where P is the loan amount (price − down payment), r is the monthly rate (APR ÷ 12), and n is the number of monthly payments.
Taxes and insurance are annual amounts divided by 12. PMI = PMI% × loan amount ÷ 12, applied only while the down payment is below 20% (in reality PMI drops off as you build equity). Total paid = all monthly P&I plus escrow items over the full term.
Estimate your monthly auto loan payment with sales tax, fees, trade-in, and down payment included — before you walk into the dealership.
Sales tax is applied to the price minus your trade-in (the rule in most U.S. states). Amount financed = price − down payment − trade-in + sales tax + fees.
The monthly payment uses the same amortization formula as a mortgage: M = P × r(1+r)ⁿ ÷ ((1+r)ⁿ − 1). Total interest = all payments minus the amount financed. Total cost = down payment plus every monthly payment.
Estimate the monthly payment, total interest, and payoff date for any fixed-rate loan — and see exactly what an extra monthly payment saves.
| Year | Principal paid | Interest paid | Balance |
|---|
Monthly payment uses the amortization formula M = P × r(1+r)ⁿ ÷ ((1+r)ⁿ − 1). Each month, interest accrues on the remaining balance and the rest of your payment reduces principal.
Extra payments go 100% to principal, so every future month accrues less interest — that's why even small extra payments can shave months or years off the payoff date.
Solve the four most common percentage questions — with the formula shown and a plain-English answer.
—A percent is just a fraction of 100. "15% of 240" means 0.15 × 240. "X is what percent of Y" divides X by Y and multiplies by 100. Percent change compares the difference to the starting value. Adding or subtracting a percent multiplies by (1 ± X÷100).
Convert length, weight, temperature, volume, area, speed, and time — quickly and precisely.
—Each unit is defined against a base unit (meters, kilograms, liters, square meters, meters per second, or seconds), so any conversion is value × factorfrom ÷ factorto. Temperature is different — Fahrenheit, Celsius, and Kelvin use offset formulas like °C = (°F − 32) × 5⁄9.
Short, practical explainers — no jargon, no upsell.
Commission errors are common — shadow accounting is practically a tradition in sales. Plans change mid-year, CRM data lags, splits get miscredited, and accelerators are applied inconsistently. A rep who never checks the math can quietly lose thousands per year. Running your own numbers takes two minutes and gives you a concrete, unemotional way to open the conversation with your manager or comp team: "here's the plan, here's my attainment, here's the gap."
Before you sign or dispute anything, confirm: the exact quota period and whether quota is annual or quarterly; what counts as a booking versus recognized revenue; when commission is earned versus paid; clawback terms if a customer churns; how splits and overlays are credited; whether accelerators apply to all sales above quota or only certain tiers; and any caps. Ambiguity in any of these almost always resolves in the company's favor — get it in writing.
Nearly every fixed-rate loan — mortgages, car loans, personal loans — uses the same amortization formula: M = P × r(1+r)ⁿ ÷ ((1+r)ⁿ − 1). Early payments are mostly interest because interest accrues on the full balance; as the balance falls, more of each payment hits principal. That's also why extra payments are powerful: every dollar of extra principal stops accruing interest for the entire remaining term.
Every tool on this site is an educational estimate. Real-world results depend on lender underwriting, exact compounding conventions, tax rules, insurance quotes, employer policies, and fees we can't see from here. Use these calculators to get oriented and ask sharper questions — then verify final numbers with your lender, employer, or a qualified professional before making decisions.