All Calculators

Calculate your exact age in years, months, days, and more

Calculate the exact time between two dates in various units

Calculate business days between dates, excluding weekends and holidays

Calculate duration between two times in hours, minutes, and seconds

Add or subtract days, weeks, months, and years from any date

Convert between Unix timestamps and human-readable dates

Calculate ISO week numbers from dates or find dates from week numbers

Calculate your Body Mass Index to determine if you're at a healthy weight

Estimate calories burned during various activities based on duration and body weight

Estimate your cardiovascular fitness level using heart rate or running performance

Calculate your Total Daily Energy Expenditure to determine caloric needs

Estimate your one-rep max for strength training exercises

Estimate your body fat percentage using body measurements

Calculate cardiac output using the Fick equation for medical assessment

Track fertility windows, ovulation dates, and menstrual cycles for family planning

Calculate your optimal calorie deficit for safe and sustainable weight loss with personalized macro targets

Calculate optimal protein, carbs, and fat intake based on your fitness goals

Track accumulated sleep debt and calculate recovery time needed

Track healthy weight gain during pregnancy with trimester-specific recommendations

Calculate percentages, percentage changes, and solve percentage problems

Add, subtract, multiply, and divide fractions with step-by-step solutions

Calculate percentage change between two values or find value after percentage change

Calculate area and perimeter for various geometric shapes

Calculate volume and surface area of 3D shapes including cubes, spheres, cylinders, and more

Calculate mean, median, mode, range, and other statistical measures

Find square roots with step-by-step solutions for any number

Calculate powers and exponents with step-by-step solutions and explanations

Add and subtract polynomials with step-by-step solutions - perfect for students learning algebra

Check if a number is prime or composite with factors and prime factorization

Calculate Least Common Multiple and Greatest Common Factor of multiple numbers

Solve simple algebraic expressions and linear equations with step-by-step solutions

Calculate tips and split bills easily among friends

Calculate loan monthly payments and total interest

Calculate mortgage payments with principal, interest rate, and term

Calculate future value of savings with compound interest over time

Calculate compound interest on investments with time-based growth

Calculate purchasing power changes over time and compare historical prices to current values

Calculate the monetary cost of meetings based on attendee salaries and duration

Calculate how much you need to save for retirement and plan your financial future

Estimate child support payments based on state guidelines and income

Compare total costs of leasing vs buying vehicles with depreciation and financing analysis

Calculate your take-home pay after taxes, deductions, and contributions

Convert hourly wage to annual salary with overtime and deductions

Estimate taxes for freelancers and self-employed individuals

Calculate 401(k) growth, employer match, and retirement savings projections

Comprehensive mortgage calculator with property taxes, PMI, and full cost breakdown

Determine how much rent you can afford based on income, debt, and expenses

Calculate property taxes by state or with custom rates, including exemptions

Calculate annual return on cash invested in real estate properties

Compare the long-term costs of renting versus buying a home to make an informed decision

Calculate download and upload times based on file size and internet speed

Convert between DPI/PPI, pixels, and physical dimensions for displays and images

Calculate data usage and bandwidth requirements for streaming and downloads

Calculate electricity costs for appliances based on wattage, usage hours, and rates

Estimate monthly electricity bills with tiered rates, time-of-use pricing, and utility comparisons

Test password strength and generate secure passwords with entropy analysis

Calculate potential savings, ROI, and environmental impact for solar installations

Calculate sale prices, discount percentages, and savings on purchases

Compare prices of different package sizes to find the best value

Calculate sales tax, find tax rates, or determine pre-tax amounts

Track all monthly and annual subscriptions to visualize total costs and potential savings

Calculate fuel costs for trips based on distance, fuel efficiency, and gas prices

Calculate the distance between two cities with driving, flight, and straight-line distances

Convert time between different time zones for travel planning and international meetings

Calculate your annual carbon footprint from transportation, home energy, and diet choices

Find out what the temperature was on any date in the past for any city worldwide

Calculate how much paint you need for walls, ceilings, and rooms with multiple coats

Calculate concrete needed for slabs, columns, footings, and other structures

Calculate tiles, flooring materials, and waste for any room layout

Calculate concrete mix ratios for different strengths - essential for DIY and construction projects

Calculate joint compound needed for drywall finishing and taping

Calculate pool water volume and chemical requirements for different pool shapes

Calculate exact chemical amounts needed to balance pH, chlorine, alkalinity, and other pool water parameters

Calculate your Grade Point Average based on course grades and credit hours

Calculate your grade percentage and letter grade from points earned

Calculate the exam score you need to achieve your desired final grade

Calculate your predicted AP exam score based on multiple choice and free response performance

Predict foal coat colors based on parent genetics with probability calculations

Convert dog years to human years based on breed size with health insights

Calculate the total cost of pet ownership including initial, monthly, and lifetime expenses

Calculate how much fabric you need for sewing projects based on garment type and size

Calculate seam allowances for different garment types, fabrics, and construction methods

Grade sewing patterns between sizes with accurate measurements for professional results

Convert between common sewing and tailoring measurements - inches, centimeters, yards, meters, and more

Find the right thread type, needle size, and stitch settings for your fabric and project

Convert all body measurements at once between inches and centimeters - neck, chest, waist, hips and more

Scale recipe ingredients up or down for different serving sizes - supports fractions and common measurements

Convert between cups, tablespoons, ounces, grams, and more cooking measurements

Calculate ingredient ratios for bread, pastries, and baked goods with weight and volume conversions

Calculate recipe costs and profit margins for restaurants and home cooking

Convert oven recipes to air fryer times and temperatures with cooking presets

Calculate the perfect coffee-to-water ratio for various brewing methods including pour-over, French press, and espresso

Calculate bowling scores frame by frame with automatic strike and spare handling

Calculate the probability of going dry on rare drops in Old School RuneScape

Calculate pace, time, or distance for running with split times and training zones

Calculate the Keyword Golden Ratio to find low-competition keywords that can rank quickly

Calculate your Instagram engagement rate and compare it to industry benchmarks