Simple Interest Calculator
Calculate simple interest and final balance for a principal over any period.
Calculate simple interest and final balance for a principal over any period.
Compute the 2024 federal income tax owed by a single (unmarried) filer with the given taxable income, using the publishe...
Estimate the monthly payment, total interest, and full payoff cost of a fixed-rate auto loan from price, down payment, t...
Compute the quick ratio (acid-test) — a stricter liquidity measure that excludes inventory: (cash + marketable securitie...
Add VAT/GST to a net price, or back the tax out of a tax-inclusive price, with any rate from 0 to 30%.
Compute the steady-state amplitude of a driven, damped harmonic oscillator with driving force F₀cos(ωt) and damping γ =...
Compute the after-tax yield of a corporate bond by multiplying the pre-tax coupon yield by (1 − marginal tax rate). Usef...
Values equity per share using the residual income model: intrinsic value equals book value plus the present value of exc...
Calculates Resting Metabolic Rate (RMR) from lean (fat-free) body mass using the Cunningham equation. More accurate than...
Calculates the percentage of the NIOSH daily noise dose from exposure duration and sound level. 100% dose indicates the...
Translate a percentage raise into a new salary and a per-paycheck dollar amount, or back out the percentage change betwe...
Calculates SWOLF = stroke count + time (seconds) for one pool length. Lower SWOLF indicates better swim efficiency. A co...
Needs, wants, and savings at 50/30/20 is a starting point — not a rulebook. Here is how to adapt it when your life doesn't fit neatly into t...
The same $250 a month looks unremarkable for a decade and then suddenly dominates the chart. Here is why compounding behaves that way.
A calm, jargon-free walkthrough of what actually drives your monthly mortgage payment — and how to make the number smaller.
We pulled usage data across our 30 most-visited calculators to understand how readers actually use consumer finance tools. Findings, caveats...