Useful Tools.
Fast, private, browser-based calculators and little utilities. Everything runs locally in your browser — no sign-up, no tracking, no data leaves the page.
Finance
Mortgages, loans, savingsMortgage Calculator
Monthly, biweekly & accelerated payments, extra and lump-sum payments, total interest, and a full amortization schedule.
Car Purchase & Loan
Finance vs cash, monthly payment & total interest, depreciation over time, and negotiation tips.
Loan Payoff
See how extra payments shrink a loan’s term and total interest.
Compound Interest
Project savings growth with regular contributions and compounding.
Home Affordability
How much house fits a given income, down payment, and rate.
Everyday
Small utilities for daily mathTip & Split
Split a bill and tip across any number of people, with optional rounding.
Percentage
Percent of, percent change, and reverse percentages in one place.
Unit Converter
Length, weight, temperature, and more — instant conversions.
Age / Date Difference
Exact time between two dates, in years, days, and hours.
BMI
Body Mass Index from height and weight, with category context.
Fuel / Trip Cost
Estimate trip cost from distance, mileage, and fuel price.
Generators & Text
Make things, count thingsPassword Generator
Strong, random passwords with adjustable length and rules.
QR Code
Turn a link or text into a scannable QR code, instantly.
Word & Character Counter
Live word, character, sentence, and reading-time counts.
More tools landing here over time. Everything is open and runs entirely in your browser.