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Math Calculators
Scientific, fractions, algebra, statistics, geometry, trigonometry, number theory, and more.
Financial Calculators
Mortgage, investment, retirement, tax, auto loans, savings, credit cards, and 70+ more tools.
Health & Fitness Calculators
BMI, BMR, body fat, calories, pregnancy, ovulation, macros, TDEE, GFR, and 28+ tools.
Electrical Calculators
Ohm's law, watts, volts, amps, kW, kVA, energy cost, electricity bill, wire gauge, and more.
Grade & GPA Calculators
GPA, grade, final grade, letter grade conversion, high school and college grade tools.
Time Calculators
Age calculator, birthday finder, date difference, time duration, and scheduling tools.
Lighting Calculators
Lumens, lux, candela, footcandles, watts — complete lighting conversion and calculation tools.
Wire Calculators
Wire gauge (AWG/SWG), voltage drop, and wire sizing tools for electrical installations.
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Math Calculators
General math, fractions, statistics, geometry, and trigonometry
Scientific Calculator
Fraction Calculator
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Binary Calculator
Hex Calculator
Half-Life Calculator
Quadratic Formula Calculator
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LCM Calculator
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Factor Calculator
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Matrix Calculator
Scientific Notation Calculator
Big Number Calculator
Standard Deviation Calculator
Number Sequence Calculator
Sample Size Calculator
Probability Calculator
Statistics Calculator
Mean, Median, Mode Calculator
Permutation & Combination
Z-Score Calculator
Confidence Interval Calculator
Triangle Calculator
Volume Calculator
Slope Calculator
Area Calculator
Distance Calculator
Circle Calculator
Surface Area Calculator
Pythagorean Theorem
Right Triangle Calculator
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Financial Calculators
Mortgage, investment, retirement, loans, tax, and more
Mortgage Calculator
Amortization Calculator
Compound Interest Calculator
Investment Calculator
Retirement Calculator
Loan Calculator
Income Tax Calculator
Auto Loan Calculator
401(k) Calculator
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ROI Calculator
Budget Calculator
Sales Tax Calculator
Credit Card Calculator
Student Loan Calculator
Discount Calculator
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Health & Fitness Calculators
Body metrics, pregnancy, nutrition, and more
BMI Calculator
Calorie Calculator
Body Fat Calculator
BMR Calculator
Ideal Weight Calculator
Pace Calculator
Army Body Fat Calculator
One Rep Max Calculator
Target Heart Rate Calculator
Pregnancy Calculator
Due Date Calculator
Ovulation Calculator
Period Calculator
Macro Calculator
TDEE Calculator
BAC Calculator
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Electrical Calculators
Ohm's law, unit conversions, power, energy
Ohm's Law Calculator
Power Calculator
Electricity Bill Calculator
Amps to kW Calculator
Watts to Amps Calculator
Volts to Amps Calculator
Voltage Drop Calculator
Power Factor Calculator
kVA to kW Calculator
kWh to Watts Calculator
Energy Cost Calculator
Wire Gauge Calculator
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Grade & GPA Calculators
Academic grade and GPA tools
Time Calculators
Age, date, time duration tools
Lighting Calculators
Lumens, lux, candela, and photometric conversions
Wire Calculators
Wire gauge, AWG, SWG, and voltage drop tools
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