New this week

Calculates moment of inertia and section properties of an I or H section.

Calculates area moment of inertia of a rectangular section.

Computes volume, surface area and related properties of a cylinder.

Computes volume and surface area of a torus.

Computes Euler buckling load of a column for different end supports.

Finds reactions, shear, moment and deflection for a cantilever beam.

Finds reactions, shear, moment and deflection for a simply supported beam.

Fifty-plus number crunchers aimed at marketers, freelancers and online sellers, with no account needed.

Estimates BMR, maintenance calories and a macro breakdown from body stats and activity.

Calculates night shift premium with reduced night hour.

Simulates INSS retirement eligibility under the reform rules.

Calculates payroll with INSS, IRRF and FGTS.

Calculates overtime pay under CLT.

Estimates the yearly PIS/PASEP allowance.

Calculates profit sharing and the tax on it.

Estimates termination pay for a Brazilian employee.

Estimates payments in an indirect termination, where the employer is at fault.

Calculates pay and eSocial charges for domestic employees.

Calculates net salary after INSS and IRRF.

Estimates INSS maternity pay.

Estimates unemployment insurance.

Simulates a Brazilian payslip from salary and deductions.

Calculates meal voucher cost and employee deduction.

Portuguese payroll calculator, entry point for 13th-salary computations.

Scientific calculator in Portuguese with trig and log functions.

Portuguese-language loan and financing calculator.

Portuguese body mass index calculator.

Portuguese matrix calculator for common operations.

Brazilian-Portuguese percentage calculator.

Calculates Spanish net pay from gross with IRPF and social security for 2026.

Takes shares, pre-money valuation and raise to show the new investor stake, post-money value and dilution.

Computes return on ad spend and break-even ROAS from revenue and spend.

Browser calculator that handles decimals, negative values and percentages.

Builds a monthly cost estimate for AWS services from the configuration you choose.

Monthly instalment and total interest for a home, car or personal loan.

Return on investment from gains and costs, with total ROI and annual figures.

Mutual fund SIP projection from monthly investment, expected return and period.

Gratuity and bill-splitting helper for meals and services.

A basic calculator built as an installable offline-capable web app with React and Redux.

Projects a 401(k) balance and payout, including employer match and early-withdrawal effects.

Calculates exact age in years, months and days between a birth date and any other date.

Monthly payment of an amortized loan with a schedule, balance graph and principal-versus-interest split.

Monthly payment and total cost of a car loan after sales tax, fees, trade-in and down payment.

Estimates blood alcohol concentration from drinks, body weight and time elapsed.

Computes body mass index from height and weight and shows the matching weight category.

Estimates basal metabolic rate and daily calorie needs from body measurements and activity level.

Gives a body fat percentage from tape measures using the Navy method, plus a BMI-based figure.

Sizes heating or cooling capacity in BTUs for a room or house.

Plans a personal budget with income, expenses and debt-to-income ratio.

Works out how many daily calories keep your weight steady or move it up or down, based on standard BMR formulas.