Flight Plan

Aeroplanner — a good resource for measuring the flight plan

Flight Time

Time and Distance Calculator — calculates the distance and the time of a flight

Flight Route

Aviation's Databases — those seeking to measure a flight’s route and distance should find this tool useful

New & Used Car Pricing

Real Cost of Car Ownership — calculator demonstrating how the cost of a new or used car is more than its sticker price

Measurement & Torque

Horsepower Design Equations — allows for the measurement of torque

Car Payment

Loan Calculator — a great calculator for estimating one’s total car payment

Car Depreciation

Car Depreciation Calculator — gives the first year and total lifetime car depreciation amount

Emissions

Emissions Maps and Calculators — estimate the amount of greenhouse gases your travel produces with this resource

Fuel: Costs & MPG

AAA Fuel Cost Estimator — allows drivers to get an idea of the fuel cost for a planned trip

MPG Calculator — tool to show how much gas mileage you are really getting

Tax Calculator

Withholding Calculator — multi-page calculator for making sure you have enough U.S. income tax withheld from your paychecks

Loan Calculator

Loan Interest Calculator — helps users figure out how quickly they will repay loans under different scenarios

Lease Calculator

Lease Calculator — helps users figure out the monthly lease payment under multiple purchase options and various scenarios

Finance Rate

APR Calculator — measures the real annual percentage rate of any loan

Mortgages

Mortgage Payment Calculator — allows users to estimate a monthly mortgage payment and total real cost for a home

Retirement/Benefits

Retirement Planner — keep track of how well you will be funded for retirement with this tool

Retirement Income Calculator — tells you how much your benefits and more will provide in retirement

Salary/Hourly Wage & Timesheets

Salary Calculator USA — measure your real salary, take home pay, and more with these calculators

Social Security

Benefit Calculator — allows you to estimate your future Social Security benefits

Trust Funds

Trust Fund Calculator — tool that gives actual present value of a trust fund

Blackjack

Online Blackjack Calculators — many calculators that can improve your odds at blackjack

Horse Racing

Exotic Wager Cost Calculator — gives the cost of an exotic wager at a horse race

Odds & Percentages

Lottery Games Odds Calculator — measure your real odds in many kinds of lottery

Poker

Poker Tools — measure the odds for any given hand in any given poker game

Slot Machines

Slot Machine Simulation — simulate a slot machine game and get the odds for winning

Depth of Field

Depth of Field Master — handy resource for photographers to measure their depth of field

Exposure

Pinhole Calculator — lets photographers measure various exposure times and more

Field of View

Field of View Calculators — calculate the field of view for several Canon and Nikkon cameras

Film Development

Massive Development Chart — largest database of development information for black and white film that allows users to contribute data

Shutter Speed

Shutter Speed Calculator — online tool for calculating shutter speed

Sun's Position

Sun's Position Calculator — gives users the ability to determine the sun’s position anywhere and at any time of the year

Clocks/Watches/Time Sundials

Time Duration Calculator — allows user to measure the numbers of hours and minutes between two times on the clock

Time Zone Converter — give the time in one time zone and figure out the time in another

Solar Energy

Solar Power Calculator — measure the size and cost of a solar power project at your home or other location

Wind Energy

Wind Turbine Payback — calculate how long it will take to recoup an investment in a mini wind turbine

International Conversion

Clothing Size Conversion Table — chart allowing users to find clothing size equivalents between the United States, the UK, and Europe

Online Clothing Conversions — many different online clothing size conversions, including shoes, rings, and more

Conversion Sizes

Cooking Conversion Calculator — at-home cooks will relish this easy-to-use cooking size convertor

Caloric Rates

Daily Calorie Needs — figure out how many calories your body needs every day

BMR Calculator — estimate the amount of calories your body burns when at rest, the basal metabolic rate

Body Fat & Mass

Body Fat Percentages — lets you calculate your body fat percentage

Standard BMI Calculator — find out if you have a healthy body mass index with this instrument

Calories in Food

Calories & Nutrition Calculator — calculate the amount of calories you consume, including packaged foods

Scales

Scale Tool — free registration required for this tool that allows you to recalculate scales and tune pianos and guitars

Notes

Frequency to Note Calculator — allows users to determine what notes certain frequencies represent

Tuning

Musicalc — sound engineers and musicians will like this downloadable calculator that calculates tempo, delay, and frequency

Music Calculator — several different musical calculators to help with tuning and other musical calculations

Intervals

IntervalCalc — an interval calculator available through sharing art or for a small fee

Basic Math

Basic Math Calculator — a simple calculator that performs all basic math functions

Simple Logarithm Calculator — calculate simple logarithms with this handy calculator

Square Root Calculator — find the square root of any number with this tool

Trigonometry Function Calculator — a calculator to measure sine, cosine, tangent, and more

Analytical Geometry Calculators — various calculators to for use in analytical geometry

Statistics Calculators — tons of free statistics calculators

Calculus Calculators — all manner of calculus-related calculators

Adding Machines

Adding Machine or Running Tape Calculator — allows users to run a calculator online that works just like a physical adding machine

Paper Tape Calculators

Paper Tape Calculator 2.3 — free downloadable program that converts calculations into a .txt format

Fractions

Fraction Calculator — add, multiply, subtract, or divide with this easy-to-use fraction calculator

Fraction to Decimal Calculator — tool for the conversion of fractions into decimals

Unit Conversion

Hour Minute Calculator — convert hours to minutes, add total times, and more

Distance and Length Conversion Online — change kilometers to miles and convert many other distance units

Length Units Converter — various length units can be converted into other forms on this page

Speed Unit Converter — convert speed measurements from one system to another here

Weight Converter — find the equivalents of grams to ounces, kilograms to pounds, and more

Volume Conversion Calculator — change liters to gallons and convert other volume units between the metric and imperial measurement systems

Foreign Trade

Free Currency Calculators — calculate different currency values relative to one another and more

Import/Export

Duty Calculator — calculates the cost to import and export goods from Europe

Export Price Index Calculator — figure the export price according to inflation with this calculator

Inflation/Cost-of-Living

Inflation Calculator — calculates the value of dollars between various years according to historic inflation

Cost-of-Living Calculator — measure the difference in the cost-of-living between many different cities

Interest Rate

Compound Interest Calculator — see how savings can grow over time with this compound interest calculator