Free Online Calculators

Convert amperes to kilowatts for DC and AC circuits

Convert amperes to watts with power factor

Convert watts to amperes for any circuit type

Calculate voltage, current, resistance, and power

Calculate voltage drop and wire sizing

Predict your AP Biology exam score

Predict your AP Calc AB exam score

Predict your AP Calc BC exam score

AP Calculus score predictor

Predict your AP Chemistry exam score

Predict your AP CSA exam score

Predict your AP CSP exam score

Predict your AP Economics exam score

Predict your AP Euro exam score

Predict your AP Gov exam score

AP History score predictor

Predict your AP Human Geo exam score

Predict your AP Lang exam score

Predict your AP Lit exam score

Predict your AP Macro exam score

Predict your AP Micro exam score

Predict your AP Physics 1 exam score

Predict your AP Physics C exam score

AP Physics score predictor

Predict your AP Precalc exam score

Predict your AP Psych exam score

Predict your AP Stats exam score

Predict your AP World exam score

Predict your APUSH exam score

Calculate your ACT composite score

Estimate college admission chances

Check acceptance probability

Calculate your overall course grade

What score do you need on the final?

Calculate your grade point average

Calculate college GPA with credit hours

Calculate weighted & unweighted GPA

Calculate your cumulative GPA

Calculate weighted grades by category

Calculate mean, median, and mode

Calculate test scores and letter grades

Calculate your semester GPA

Estimate your SAT score from raw scores

Calculate your Body Mass Index

Calculate Basal Metabolic Rate

Calculate daily calorie needs

Calculate Total Daily Energy Expenditure

Calculate your ideal body weight

Estimate your body fat percentage

Calculate protein, carbs, and fat needs

Calculate daily protein requirements

Calculate daily water needs

Calculate waist-to-hip ratio

Calculate tips and split bills

Calculate sale prices and savings

Calculate markup and profit margin

Calculate monthly mortgage payments

Convert between hourly and annual salary

Convert annual salary to hourly rate

Convert hourly wage to annual salary

Calculate sales tax amounts

Calculate simple interest

Calculate compound interest growth

Calculate return on investment

Calculate student loan payments

Calculate trip fuel costs

Calculate dates X days from now

Find the date 30 days from now

Find the date 60 days from now

Find the date 90 days from now

Find the date 14 days from now

Find the date 45 days from now

Calculate dates X weeks from now

Calculate dates X months from now

Add or subtract days from any date

Calculate days between two dates

Calculate business days between dates

Count working days with custom workweek

Add, subtract, and calculate hours

Calculate time between two times

Live countdown to any date

Convert times between time zones

Calculate pregnancy due date

Calculate exact age from birthdate

Calculate minutes in any year

Calculate percentages and percent change

Calculate percentage increase or decrease

Convert between 80+ measurement units

Convert between world currencies

Convert between Celsius and Fahrenheit

Convert Celsius to Kelvin

Convert Fahrenheit to Kelvin

Convert oven temperatures and gas marks

Calculate BTU requirements

Calculate heat index from temperature and humidity

Calculate wind chill factor

Calculate standard deviation and variance

Add, subtract, multiply, divide fractions

Solve ratio and proportion problems

Calculate probability of events