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Professional online calculation tools to help you complete various daily calculations quickly
Calculate monthly payments, total interest, and complete amortization schedule
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New ReleaseCompare long-term costs of buying vs renting to make informed decisions
Compare renting and buying a US home with mortgage, tax, insurance, HOA, maintenance, appreciation and investment return
New ReleaseCalculate rental yield, annual return, cash flow and payback period analysis
Calculate compound interest effects and long-term returns of regular investments
Assess retirement fund needs and plan monthly savings goals for comfortable retirement
Quickly estimate investment doubling and tripling time with rule accuracy comparison
Calculate DCA compound effects and return scenarios, compare ETF vs fund fees
Calculate dividend yield, ex-dividend price, fill-in days and reinvestment effects
Calculate trading fees, taxes and P&L with break-even and day trading analysis
Real-time exchange rates for multiple currency conversions
Quickly convert hourly, daily, monthly, and yearly salary to compare job offers
Estimate US overtime pay from hourly wage, regular hours, overtime hours, multiplier and pay frequency
Estimate monthly and annual insurance premium ranges by type, age, location, coverage, deductible and risk factors
New ReleaseCalculate labor, health, employment insurance and pension with employer cost analysis
Calculate net bonus after supplementary NHI and withholding tax, compare split payment benefits
Estimate Taiwan comprehensive income tax, effective and marginal rates using official 2025 brackets and deductions
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New ReleaseCalculate revolving interest and minimum payments to avoid high interest charges
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New ReleaseVisualize your debt payoff journey using snowball or avalanche strategies
Calculate appliance power consumption and costs with energy-saving tips
Calculate complete pet expenses including food, medical, grooming for budget planning
Calculate yearly subscription costs to plan your subscription budget
Calculate required AC capacity based on room size
Estimate residential HVAC load in BTU/hr and tons from square footage, climate, insulation, ceiling height, sun and occupants
New ReleaseEstimate kitchen, bathroom, flooring, painting and general remodel cost ranges with contingency
New ReleaseEstimate roof replacement cost by area, pitch, material, tear-off, region and complexity
New ReleaseCalculate final prices for various discounts like 15% off, BOGO half price
Calculate percentages, values, increases/decreases with step-by-step solutions
Split bills for dining, group buys, travel - auto-calculate who owes whom
Quickly calculate tip amount and split the bill
Calculate real cost per wear to determine if clothing is worth buying
Calculate total cost of car ownership including taxes, insurance, fuel, and maintenance
Calculate vehicle fuel consumption and cost per kilometer for economical driving
Calculate parking fees precisely, compare hourly vs monthly rates for best value
Predict next week's fuel price changes, calculate if queuing to save money is worth it
Calculate Body Mass Index (BMI) and Total Daily Energy Expenditure (TDEE) for health goals
Calculate daily water intake based on weight, activity and climate conditions
Calculate alcohol metabolism time and when it's safe to drive
Calculate caffeine metabolism time and optimal sleep timing
Calculate hair growth rate and projected length
Convert glasses prescription to contact lens power
Calculate protection time based on SPF, skin type and UV index with reapply reminders
Calculate calories burned using METs formula, supports 20+ exercise types
Calculate BMR, TDEE and daily calorie needs with personalized macro distribution
Calculate target heart rate zones for exercise
Predict next period and ovulation dates for cycle management
Calculate due date and pregnancy weeks from last menstrual period or conception date
Calculate recommended weight gain range based on pre-pregnancy BMI
Calculate growth percentile using WHO/CDC standards for ages 0-20
Calculate recommended wire gauge based on load, length and voltage drop
Calculate total electrical load and appropriate breaker capacity to prevent overload
Calculate appropriate pipe diameter based on flow rate and pressure requirements
Calculate voltage and capacity for series/parallel battery configs
Calculate required lighting brightness and fixture count based on space and use
Calculate required board quantity, size and cutting plan to reduce waste
Calculate total area from multiple regions
Convert power tool speed and torque values
Calculate stair rise, run and number of steps
Optimize linear material cutting plans to minimize waste
Calculate spring stiffness and deflection
Calculate V-belt or timing belt required length
Calculate drill size needed for thread tapping
Calculate CNC machining scallop height and step-over
Calculate O-ring gland dimensions for sealing design
Calculate bolt circle hole coordinates
Cross-standard surface finish, IT tolerance & general tolerance
New ReleaseCalculate pump head and power requirements
Calculate horizontal cylindrical tank volume at different levels
Calculate time to fill air compressor to target pressure
Identify resistor values from color bands or calculate codes
Identify inductor values from color bands or calculate codes
Calculate optimal antenna length for various types
Convert between dBm, watts, milliwatts and other power units
Searchable drying/barrel/melt/mold temp, pressure/speed, back pressure and shrinkage for 28 plastics, each HIGH/MED/LOW confidence-graded
New ReleaseDIN 16742 / ISO 20457 tolerance groups (TG1–TG9, W/NW) plus US per-material commercial/precision tolerances, honestly confidence-graded
New ReleaseAccurately estimate complete education expenses from kindergarten to university
Calculate monthly payments, grace period interest, and early repayment savings
Calculate required score to reach target grade
Evaluate difficulty and time needed to learn a new language
Factor integers into prime number products
Calculate greatest common divisor and least common multiple
Add, subtract, multiply, divide and simplify fractions
Convert and calculate with scientific notation
Solve linear and quadratic equations
Add, subtract, multiply, divide and factor polynomials
Solve systems of 2 or 3 linear equations
Calculate and convert between exponents and logarithms
Calculate arithmetic and geometric sequence terms and sums
Calculate terms of recursively defined sequences
Calculate area and perimeter of various geometric shapes
Calculate sector area, arc length and central angle
Calculate triangle sides, angles and area
Calculate sin, cos, tan and other trig functions
Plot mathematical function graphs
Calculate definite and indefinite integrals
Calculate function limits
Add, subtract, multiply, transpose and invert matrices
Calculate dot products, cross products and vector operations
Calculate mean, standard deviation, variance and more
Calculate permutations and combinations
Calculate probabilities for various distributions
Calculate solution concentration and dilution
Calculate moles, molecular weight and mass relationships
Calculate solution pH and hydrogen ion concentration
Match foundation shades by skin tone and type with multi-brand conversion
Calculate daily skincare usage and expiration | Track opening dates | Avoid waste
Calculate precise bra size with international size conversion and fitting tips
Measure finger size and convert to 6 ring size standards with proposal tips
Convert clothing sizes across US/UK/EU/JP/KR/IT/FR for online shopping
Convert shoe sizes across US/UK/EU/JP/CN/KR, essential for online shopping
Calculate ideal boot shaft height and circumference
Calculate hat size from head circumference
Calculate ideal watch strap length and width
Enter options and spin the wheel for random selection
Fun party game tool
Calculate winning odds, expected value and fairness analysis with optimal strategies
Calculate pull rates for Genshin, Star Rail with soft pity and 50/50 mechanics
Convert yarn weight and amount between different gauges
Calculate lye amount needed for soap making recipes
Quantify the real cost of procrastination, see the shocking difference of starting a year earlier
Calculate your bubble tea spending and calories
Calculate exact age, days, weeks | Birthday countdown | Milestone tracking
Manage birthday reminders and countdowns for multiple people
Enter the number of invoices you hold to estimate the odds for each prize, the odds of any win, and the expected winnings
New ReleaseAdjustable tempo online metronome
Experience the preciousness of life through intuitive visualization
Taiwan Address to English | Postal Code | QR Code
Convert Arabic numbers to Chinese uppercase/lowercase, check amount conversion
Base64 encoding and decoding conversion tool
Compare two texts to find differences with visual highlighting
Real-time word, character count and reading time with social platform limits check
Remove extra whitespace, line breaks and special characters
Quick note-taking in your browser
Convert length, weight, area, volume, temperature and more units quickly
Calculate how to dilute 95% alcohol to 75%, supports volume and weight methods
Multiple rounding modes, significant figures, error propagation calculation
Solve proportions, calculate golden ratio, map scale conversion
Convert between Western, ROC & Lunar dates | Zodiac & star sign lookup
Count down to special dates including Lunar New Year, Valentine's Day, and more
Convert between Unix timestamp and date/time
Calculate departure time from target arrival time
Convert between HEX, RGB, HSL color codes
Calculate optimal print size and cropping for photos
Convert between binary, octal, decimal, hexadecimal
Look up IP address geographic location and information
Test screen for dead pixels, color accuracy and grayscale
Convert text to uppercase, lowercase or other formats
Quickly convert addresses to Windy weather map links
Accurately calculate sunrise/sunset times and directions, essential for camping
Calculate projector throw distance and screen size
Calculate optimal viewing distance for screens
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