Calculators

Voltage (V) in volts Current (I) in amperes Resistance (R) in ohms Power (P) in watts Calculate Ohms Law Voltage— Current— Resistance— Power— Enter exactly two values and leave the other two blank. The tool names the pair you used and solves all four values. An ohms law calculator finds the missing electrical values in…

Shingle Calculator Roof length (feet) Roof width (feet) Roof pitch — rise per 12 inches of run Waste percentage (%) Bundles per square Calculate Shingles Please enter a length and width above zero, a pitch rise of zero or more, a waste percentage of zero or more, and bundles per square above zero. Footprint area—…

Steps to Calories Calculator Steps Weight (kg) Walking paceSlowModerateBrisk Step length (cm) Calculate Calories Distance Time Total calories Active calories Calories per 1000 steps Steps to Calories Calculator A steps to calories calculator turns a step count into distance, time, and calories burned. It starts from four inputs the reader can check: how many steps…

Car Payment Interest Calculator Vehicle price ($) Down payment ($) Trade-in value ($) Sales tax % (optional, enter 0 if paid separately) Other fees to finance (optional) ($) Annual interest rate (%) Term (months) Calculate Car Payment Your down payment and trade-in already cover the price plus tax and fees, so no loan is needed.…

Time Distance Speed Calculator Section A – Find speed Distance in km Time hours Time minutes Find Speed Average speed km per hour Average speed miles per hour Section B – Find distance Speed in km per hour Time hours Time minutes Find Distance Distance km Distance miles Section C – Find time Distance in…

ROI Calculator Amount invested Amount returned Years held (optional) Calculate ROI Net gain or loss Total ROI percent Annualized ROI What is return on investment? Return on investment, or ROI, is the gain or loss on an investment expressed as a percentage of what was put in. If you invest 10000 and get back 12500,…

FFMI Calculator Weight in kilograms Body fat percentage Height in centimetres Calculate FFMI Normalised FFMI kg per square metre Raw FFMI kg per square metre Lean mass kg Fat mass kg Fat Mass Index (FMI) kg per square metre Reading What is FFMI? FFMI, the fat-free mass index, is your lean body mass divided by…

Minutes Calculator Section A – Convert minutes Minutes Convert Minutes Hours and minutes Decimal hours Seconds Days Section B – Add time to a clock time Start timeHour123456789101112 AMPM Hours to add Minutes to add DirectionAddSubtract Find New Time New time Day shift Section C – Time between two clock times Start timeHour123456789101112 AMPM End…

Basal Metabolic Rate Calculator SexMaleFemale Age in years Weight in kilograms Height in centimetres Activity levelSedentaryLightly activeModerately activeVery activeExtra active Calculate BMR BMR kcal per day Burn per hour kcal per hour Daily needs (TDEE) kcal per day Activity multiplier What is basal metabolic rate? Basal metabolic rate, or BMR, is the number of calories…

GPA Calculator Course 1 letter gradeSelect gradeA+AA-B+BB-C+CC-D+DF Course 1 credits Course 2 letter gradeSelect gradeA+AA-B+BB-C+CC-D+DF Course 2 credits Course 3 letter gradeSelect gradeA+AA-B+BB-C+CC-D+DF Course 3 credits Course 4 letter gradeSelect gradeA+AA-B+BB-C+CC-D+DF Course 4 credits Calculate GPA GPAon the 4.0 scale Total quality pointsquality points Total creditscredits Calculation runs in the browser; nothing is uploaded or…

Weighted grade Grade 1 (%) Weight 1 (%) Grade 2 (%) Weight 2 (%) Grade 3 (%) Weight 3 (%) Grade 4 (%) Weight 4 (%) Calculate grade Weighted gradepercent Letter gradecommon 10-point scale Completed weightpercent What do I need on the final? Current grade (%) Final exam weight (%) Target grade (%) Calculate required…

Gross pay per period Pay frequencyWeekly (52)Bi-weekly (26)Semi-monthly (24)Monthly (12) Federal tax (%) State tax (%) FICA (%) Other deductions per period Calculate take-home pay Net pay per periodper period Annual net payper year Monthly net payper month Total deductions per periodper period Effective deduction ratepercent Calculation runs in the browser; nothing is uploaded or…

Length (ft) Width (ft) Depth (in) MaterialTopsoilFill dirtGravelCompostMulch Waste / settling (%) Bag size (cu ft)1 cu ft2 cu ft3 cu ft Calculate dirt Areasq ft Volumecubic feet Cubic yardscubic yards, before waste Order volumecubic yards, after waste Estimated weighttons () Bagsbags Calculation runs in the browser; nothing is uploaded or stored. How to use…

Length (ft) Width (ft) Thickness (in) Waste (%) Calculate concrete Volumecubic feet Order volume with waste cubic feet cubic yards 80 lb bagsbags 60 lb bagsbags 40 lb bagsbags Calculation runs in the browser; nothing is uploaded or stored. How to use this concrete slab tool Enter the length and width of the slab in…

Double integral calculator online free. Numerically approximate double integrals over a rectangle with Simpson’s rule, in your browser. No sign-up.

Water intake calculator online free. Estimate your daily water target from body weight (kg or lb) and exercise — in ml, litres, glasses and bottles, in your browser.

Year-over-year growth calculator online free. Get the YoY percentage change, absolute change and growth multiplier between two periods, with steps shown, in your browser.

Present value of money calculator online free. Discount a future amount to today’s value with the discount factor shown as a step, plus the total discount, in your browser.

Population growth calculator online free. Project a population forward at a steady annual rate with a year-by-year table, total increase and growth factor, in your browser.

Cost index calculator online free. Adjust any amount between two dates using CPI values — index ratio, adjusted amount and percentage change shown step by step, in your browser.

Loan early repayment calculator online free. See how extra monthly payments or a lump sum cut your payoff time and total interest, compared month by month, in your browser.

Angle of complex number calculator online free. Find the argument in degrees and radians and the modulus of a + bi, with the quadrant steps shown, in your browser.

Cosh calculator online free. Calculate cosh(x) from the exponential definition, with sinh(x), tanh(x) and the identity check shown step by step, in your browser.

Euler phi function calculator online free. Compute Euler’s totient phi(n) from the prime factorisation, with the product formula shown step by step, in your browser.

Fibonacci series calculator online free. Generate the first N Fibonacci numbers with every addition step shown, or find a single term F(k) exactly, in your browser.

Linear equations in two variables calculator online free. Solve a pair a x + b y = c with determinants, all steps shown, plus honest no-solution and infinite-solution verdicts.

Mid point rule calculator online free. Approximate a definite integral numerically with the midpoint rule and see the full table of midpoints and values.

Polynomial root calculator online free. Find roots of polynomials up to degree 4: exact formulas for degrees 1 and 2, labelled numeric roots for 3 and 4.

Partial fraction calculator with steps online free. Decompose proper fractions with distinct linear factors by the cover-up method, every substitution shown.

LCM of fractions calculator online free. Find the least common multiple of fractions with the numerator and denominator rule, every step shown, in your browser.

Greater than less than fractions calculator online free. Compare two fractions with cross-multiplication shown, decimals, and the exact difference, in your browser.

Dividing decimals calculator online free. Divide decimals with the long-division steps shown and the quotient to your chosen precision, in your browser.

Rhombus calculator online free. Find the area and perimeter of a rhombus from its diagonals or from a side and angle, with formulas shown, in your browser.

Rational calculator online free. Add, subtract, multiply and divide fractions with the steps shown and answers in lowest terms, in your browser.

Substitution calculator online free. Solve two linear equations by substitution with every step shown — isolate, substitute, solve, check — in your browser.

Collatz sequence calculator online free. Follow the 3n + 1 rule from any starting number, see the full sequence, steps, and highest value, in your browser.

Infinite series calculator with steps online free. Add terms one by one, see every partial sum, and check whether the sums appear to settle, in your browser.

Piecewise integral calculator online free. Integrate a function defined in pieces, numerically, piece by piece, and add the pieces, in your browser.

Partial differentiation calculator online free. Estimate partial derivatives of a two-variable function numerically, with respect to x and y, in your browser.

Time value of money calculator online free. Work out the future value of money today, or the present value of a future amount, with compound interest, in your browser.

Long addition calculator online free. Add two whole numbers and see every carrying step, column by column from right to left, in your browser.

Law of cosines calculator online free. Find the third side of a triangle from two sides and the included angle, with full working, in your browser.

Long subtraction calculator online free. Subtract two whole numbers and see every borrowing step, column by column from right to left, in your browser.

Arithmetic sequence calculator online free. Find the nth term and the sum of any arithmetic progression from its first term and common difference, in your browser.

Gravitational force calculator online free. Compute Newton’s law of universal gravitation F = G·m1·m2/r² for any two masses and distance, in your browser.

G force calculator online free. Convert acceleration in m/s² to g-force and g-force back to m/s², using 9.81 m/s² per g, in your browser.

Sigma calculator online free. Sum a sequence term by term — n, n squared, or a constant — over any start-to-end range, in your browser.

Standard form calculator online free. Convert ordinary numbers to standard form (a × 10^n) and back, in your browser.

Log calculator online free. Find log base 10, the natural log, and logs to any custom base, in your browser.

Exponent calculator online free. Raise any base to a whole, negative or fractional power, including square roots, in your browser.

Fibonacci retracement calculator online free. Compute 23.6%, 38.2%, 50%, 61.8% and 78.6% levels from any high and low price, in your browser.

Step by step multiplication calculator online free. See every partial product of a long multiplication, plus the final product, in your browser.

XOR calculator online free. Compute AND, OR, XOR and NOT on integers, with decimal and binary results, in your browser.

Mixed fraction calculator online free. Add, subtract, multiply and divide fractions, simplify results, and see them as mixed numbers, in your browser.

Geometry calculator online free. Find area and perimeter for rectangles, circles and triangles, with the formulas explained, in your browser.

Inflation calculator India online free. See what a sum will cost in future years and what today’s money will be worth, at any inflation rate you choose, in your browser.

Date calculator online free. Find the days between two dates, add or subtract days from a date, and find the weekday of any date, in your browser.

Discount calculator online free. Work out the sale price, discount amount and amount saved from an original price and discount percentage, in your browser.

Compound interest calculator online free. Work out how savings or an investment grows over time, with final amount and total interest, in your browser.

Tip calculator online free. Work out the tip, total bill and per-person share when splitting a bill, in your browser.

Loan calculator online free. Calculate your monthly payment, total payment and total interest from loan amount, rate and term, in your browser.

BMI calculator online free. Calculate your Body Mass Index, category, and healthy weight range from your height and weight, in your browser.

Age calculator online free. Find your exact age in years, months and days, total days lived, and your next birthday, in your browser.

Mean median mode calculator online free. Find the mean, median, and mode of any set of numbers instantly in your browser.

Percentage calculator online free. Find what percent of a number, and percentage increase or decrease, instantly.