All Tools
Explore our complete collection of 320+ calculators and converters. Designed for speed, built for accuracy.
Percentage Calculator
X% of Y, Increases, Decreases.
Percentage Change
Calculate % increase/decrease.
Grade Calculator
Final Exam Score Needed.
GPA Calculator
Semester GPA Calculation.
Unit Converter
Length, Weight, Temp, Storage.
Time Converter
Hours, Minutes, Seconds.
Discount Calculator
Calculate sale prices.
Tip Calculator
Calculate tips & split bills.
Sales Tax Calculator
Add tax to prices.
Simple Interest
Calculate simple interest.
Compound Interest
Calculate compound interest.
Age Calculator
Years, months, and days.
Age Checker
Verify age requirements.
Adding Machine
Running total & tally.
Basic Calculator
Simple arithmetic solver.
BMI Calculator
Body Mass Index (BMI).
BMI for Women
Specific BMI for women.
Character Counter
Count chars & words.
Number to Words
Cheque writing helper.
Countdown Timer
Simple event timer.
Amortization Calc
Payment schedule creator.
Equal Principal Calc
Fixed principal schedule.
APR Calculator
True loan cost (APR).
Basic APR Calc
Quick APR estimate.
Annuity Table
Loan payment tables.
Car Loan Calc
Auto loan payments.
CD Calculator
Certificate of Deposit.
Checkbook Bal
Balance your checkbook.
Bid-Ask Spread
Trading spread cost.
CAGR Calculator
Growth rate calc.
Currency Appr/Depr
Forex value change.
Currency Converter
Live-ish exchange rates.
Mean, Median, Mode
Central Tendency.
Average Calculator
Arithmetic, Geometric, Harmonic.
Standard Deviation
Population & Sample SD.
Box Plot Maker
Box & Whisker, 5-Number Summary.
Histogram Maker
Frequency Distribution.
Scatter Plot
XY Correlation Graph.
Pie Chart Creator
Create pie charts.
Probability Calculator
Calculate probabilities.
Fraction Calculator
Add, Sub, Mul, Div Fractions.
Fraction Simplifier
Simplify fractions.
Fraction to Decimal
Convert fractions to decimals.
Decimal to Fraction
Convert decimals to fractions.
Mixed Fraction Calculator
Work with mixed numbers.
Quadratic Solver
Solve ax² + bx + c = 0.
System Solver
Solve X and Y equations.
Function Grapher
Plot y=f(x) equations.
Prime Checker
Check primes & factors.
GCF Calculator
Greatest Common Factor.
LCM Calculator
Least Common Multiple.
Factorial Calculator
Calculate n!
Exponent Calculator
Calculate powers.
Square Root Calculator
Calculate √x.
Log Calculator
Logarithm calculator.
Modulo Calculator
Calculate remainders.
Ratio Calculator
Simplify ratios.
Proportion Calculator
Solve proportions.
Long Division
Step-by-step division.
Rounding Calculator
Round numbers.
Significant Figures
Sig figs calculator.
Scientific Calculator
Advanced calculator.
Matrix Calculator
Matrix operations.
Vector Calculator
Vector operations.
Polynomial Evaluator
Evaluate polynomials.
Sequence Generator
Generate sequences.
Base Converter
Convert number bases.
Half-Life Calculator
Calculate decay.
1000 Prime Numbers
List of first 1000 primes.
Absolute Difference
|x - y| calculator.
Absolute Value
|x| calculator.
Acceleration Converter
Convert m/s², ft/s², g.
Acres to SqFt
Land area conversion.
Activity Depreciation
Usage-based depreciation.
Advanced Loan Calc
Amortization & payments.
Fraction Add/Sub
Plus/Minus fractions.
Integer Add/Sub
Signed number arithmetic.
Algebra Calculator
Basic algebra solver.
Age Word Problems
Solve age riddles.
Coin Word Problems
Solve coin riddles.
Angle Converter
Deg, Rad, Grad, Grp.
Annulus Calculator
Ring area & dimensions.
Area Converter
SqM, SqFt, Hectares.
Aspect Ratio
16:9, 4:3, Custom.
Average Velocity
Speed and displacement.
Weight (Avoirdupois)
lb, oz, dr, gr.
Temperature Conv
C, F, K, R conversion.
cm to inches
Length conversion.
Storage Converter
KB, MB, GB, TB.
Bingo Numbers
Random bingo caller.
Bingo Cards
Generate bingo cards.
Coin Flipper
Heads or Tails.
Circular Perm
(n-1)! arrangements.
Comb w/ Replace
n+r-1Cr calculation.
Combinations (nCr)
Standard combinations.
Complete the Square
Vertex form solver.
Compare Fractions
Greater/Less check.
Complex Fractions
Fraction of fractions.
Cube Calc (x³)
Calculate x³.
Cube Root Calc
Calculate ³√x.
Cubic Solver
Solve ax³ + bx² + cx + d.
Cubic Yds & Ft
Volume conversion.
Capsule Calc
Volume of a capsule.
Volume Calculator
Cube, Sphere, Cylinder.
Surface Area
Area of 3D objects.
Pythagorean
Calculate hypotenuse.
Circle Calc
Area, Circumference, Radius.
Triangle Calc
Area and Perimeter.
Slope Calculator
Calculate slope m.
Distance Formula
Distance between points.
Concrete Volume
Slabs & Footings.
Cone Calculator
Volume and Surf Area.
Conical Frustum
Chopped-off cone.
Date Days Calc
Count days between dates.
Date Difference
Total time between dates.
Date Add/Sub
Shift dates by units.
Decimal to %
Convert to percentage.
Decimal to Time
Convert 1.5h to 1:30.
Stopwatch
Lap timer & stopwatch.
Digits to Words
Full number translator.
Debt Ratios
DTI and other ratios.
EMI Calculator
Loan EMI payment.
Depreciation Calc
Asset value loss.
Descriptive Stats
Full summary of data.
Dice Roller
Roll virtual dice.
Diamond Solver
Solve factor diamonds.
Dot Product
Vector dot product.
Euclid's GCD
Step-by-step GCD.
Expanded Form
Decompose numbers.
E = mc²
Mass-energy formula.
Density Calc
Mass/Volume density.
Displacement
Physics displacement.
Big Exponents
Handle very large powers.
SqFt to Acres
Inverse land area conv.
SqFt & SqM
Area unit swap.
Equilateral Tri
3-sided equal shapes.
Declining Balance
Accelerated depreciation.
Fixed Annuity
Deferred annuity growth.
Effective Rate
True annual rate.
Equiv Rate
Match different frequencies.
Degrees to DMS
Convert DD to DMS.
Elastic Energy
Stored spring energy.
Equiv Fractions
Identify equal fractions.
Estimate Fractions
Rounding benchmarks.
Diff of Squares
Factor a² - b².
3D Distance
3D point distance.
Factorization
Prime & total factors.
Fibonacci
F_n sequence solver.
Fourth Root
Calculate ∜x.
Fifth Root
Calculate ⁵√x.
Fraction Exponents
x^(n/d) powers.
Fraction to %
Convert frac to pct.
Fractions Avg
Average multiple fracs.
Solve for X
a/b = x/d proportions.
Fractions Table
Reference conversion table.
Number Line
Visual fraction line.
Force (F=ma)
Newton's 2nd Law.
Force Conversion
N, dyn, lbf units.
Friction Calc
Ff = μ × Fn.
°F to °C
Fahrenheit to Celsius.
°F to K
Fahrenheit to Kelvin.
°F to °R
Fahrenheit to Rankine.
Feet & Inches
Add/Sub imperial lengths.
Federal Tax
2024 tax estimate.
Financial Ratios
Liquidity & profit ratios.
Simple FV
Lump sum growth.
Comprehensive FV
FV with deposits & taxes.
Investment FV
Portfolio compound growth.
FV Present Sum
PV to FV factors.
FV Annuity
Annuity payment growth.
FV Cash Flows
Irregular flow compounding.
FVIF Table
Single sum FV factors.
FVIFA Table
Annuity FV factors.
GPE (mgh)
Potential energy.
Ideal Gas Law
PV = nRT solver.
Impulse (F∆t)
Force and time.
Impulse-Momentum
∆p = J relationship.
Kinetic Energy
1/2 mv² solver.
Hooke's Law
F = kx springs.
Solid Geometry
3D shape formulas.
Plane Geometry
2D shape formulas.
Hemisphere
Half-sphere volume/area.
Isosceles Tri
Equal side triangles.
Golden Ratio
φ (Phi) calculations.
Car Affordability
Can you afford that car?
House Afford
Home budget limit.
Loan Afford
Maximum loan estimate.
Gross Pay
Hourly to Salary.
Inflation Calc
Money value over time.
Interest-Only
Non-principal mortgage.
Gas Mileage
MPG and fuel cost.
Investment Acct
Account growth tracker.
Investment Pro
Deep investment model.
Invest & Infl
Real rate of return.
Interest Table
Dynamic amort tables.
Inverse Trig
ArcSin, ArcCos, ArcTan.
Trig Grapher
Plot trig functions.
Height Conv
Ft/In to Centimeters.
Height (cm to ft)
CM to Ft/In.
inches to cm
Specific in to cm.
kg to lbs
Specific kg to lbs.
K to °C
Kelvin to Celsius.
K to °F
Kelvin to Fahrenheit.
K to °R
Kelvin to Rankine.
Hours Calc
Timesheet calculator.
Time Math
Add/Sub durations.
Multiplication Chart
12x12 Grid +.
Prime Chart
Primes to 100/1000.
Unit Circle
Sin, Cos, Angles.
Matrix Add
Add/Sub matrices.
Matrix Mul
Multiply matrices.
Matrix Inverse
Find A⁻¹.
Determinant
Det(A) calculation.
Matrix Transpose
Swap rows/cols.
Derivative Calc
d/dx solver.
Integral Calc
∫ f(x) dx solver.
Truth Table
Boolean logic.
Set Theory
Union, Intersection.
Long Addition
Column addition.
Long Subtraction
Column subtraction.
Long Multiplication
Standard algorithm.
Lattice Method
Lattice multiplication.
LCD Calculator
Least Common Denom.
Multiples Calc
List multiples.
Law of Sines
ASA, AAS, SSA.
Law of Cosines
SSS, SAS solver.
Log Equation
Solve log(x) = y.
Midpoint Calc
Middle of two points.
Multifactorial
n!!, n!!! solver.
Layaway Calc
Plan layaway payments.
Liquidity Ratios
Current/Quick ratio.
List Price
MSRP vs Sale.
Margin Calculator
Profit margin %.
Markup Calculator
Cost to Price.
Molecular Weight
Molar mass (chemistry).
Momentum (p=mv)
Mass and Velocity.
Mulch Calculator
Garden coverage.
Military Time
12h vs 24h clock.
Lottery Odds
Chances of winning.
Lottery Tax
Winnings after tax.
Mixed Numbers
Arithmetic with mixed.
Math Practice
Arithmetic drills.
Math Word Prob
Solver for problems.
NPV Calculator
Project profitability.
Simple PV
Value of future sum.
PV Annuity
Value of payments.
PV Cash Flows
DCF analysis.
PVIF Table
PV Factors table.
PVIFA Table
PV Annuity Factors.
Nominal Impact
Nominal vs Real.
Operating Ratios
Efficiency metrics.
Periodic Rate
Rate per period.
Profit Margin
Gross/Net margin.
Property Tax
Real estate tax.
Real Estate
Rental yield/cap rate.
Odds Calculator
Probability vs Odds.
Percent Diff
% Diff between 2 nums.
Percent Error
Accuracy check.
Percentile Calc
Find nth percentile.
Quartile Calc
Q1, Q2, Q3.
Permutations
nPr arrangements.
Perm w/ Replace
n^r arrangements.
Parallelogram
Area and Perim.
Pyramid Calc
Square pyramid vol.
Pace Calculator
Run/Walk speed.
PPI Calculator
Screen density.
Power Conv
Watts, HP, J/s.
Pressure Conv
Pa, PSI, Bar.
lbs to kg
Convert lbs to kg.
Password Gen
Secure passwords.
Pascal's Tri
Visual triangle.
Order Fractions
Ascending/Descending.
NFL Rating
QB Passer Rating.
Poker Odds
Hand win %.
Radical Simplify
Simplify √x.
Sci Notation
Standard Form.
Unit Rate
Price per item.
Rounding Methods
Floor, Ceil, Round.
Rectangle Calc
Area and Perimeter.
Rhombus Calc
Area and Perimeter.
Polygon Calc
N-sided regular.
Rect Prism
Box volume/area.
Tank Volume
Liquid capacity.
Tube/Pyramid
Shapes volume.
ROI Calculator
Return on Investment.
Rule of 72
Doubling time.
Reverse Tax
Pre-tax price.
Real Salary
Wage buying power.
Savings Goal
Plan to reach $X.
Stock Return
Gain/Loss on trade.
Z-Score Calc
Standard score.
Sample Size
Survey size needed.
Confidence Int
Margin of error.
P-Value Calc
Significance test.
Variance Calc
Data spread.
Stem & Leaf
Data visualization.
Random Number
RNG Generator.
Random Card
Pick a card.
Name Picker
Draw a winner.
Work (W=Fd)
Energy transfer.
Wavelength
Wave properties.
UAM Calculator
Kinematics solver.
Target HR
Exercise zones.
Vote Percent
Election results.
Paint Calculator
Gallons needed.
Tile Calculator
Floor/Wall tiles.
Grass Seed Calc
Lbs for lawn.
Brick Calculator
Wall bricks.
Roofing Calculator
Shingles & Bundles.
Drywall Calculator
Sheet count.
Carpet Calculator
Sq Yards & Rolls.
Fence Calculator
Panels & Posts.
Sod Calculator
Rolls & Pallets.
Pool Volume
Gallons water.
Electricity Cost
Bill estimator.
Wallpaper Calculator
Rolls needed.
Concrete Bag Calc
Bags (60lb/80lb).
Laminate Flooring
Cartons needed.
Pizza Calculator
Pizzas for party.
Party Drink Calc
Alcohol/Drinks.