Snowkit Calc
Calculators, statistics, number converters and charts.
All-in-one
- Snowkit CalcA calculator with history, variables, statistics and charts in one notebook.
- CalculatorsEveryday calculators for money, dates, health and units.
- Scientific calculatorTrig, logs, powers, roots and factorials, with keyboard support and history.
- CSV to chartPaste a CSV and export a crisp bar, line, pie or scatter chart.
School and statistics
- Statistics calculatorMean, median, mode, quartiles and standard deviation for any list of numbers.
- Final grade calculatorFind the score you need on your final exam to reach the grade you want.
- Fraction calculatorAdd, subtract, multiply and divide fractions and mixed numbers, with every step shown.
- Decimal to fractionTurn any decimal or percent into a fraction in simplest form, including repeating decimals like 0.333...
- Weighted grade calculatorWork out your overall grade from weighted categories, and what you need on the work still to come.
- Z-score calculatorZ-scores, p-values for z and t tests, and confidence intervals, with the working shown.
- P-value calculatorGet the p-value for a z-score or a t statistic with its degrees of freedom, one or two tailed, and see whether it is significant.
- Confidence interval calculatorWork out a 90, 95 or 99 percent confidence interval for a mean or a proportion from your sample, with the margin of error shown.
- GradebookA private gradebook with weighted categories, totals, letter grades and CSV import and export.
Number converters
- Number converterBinary, octal, decimal and hex, Roman numerals, and numbers written in words.
- Roman numeral converterConvert numbers to Roman numerals and Roman numerals to numbers, from 1 to 3999.
- Number to wordsWrite any number out in English words, with or without “and”, or as a check amount with cents.
Money
- Mortgage calculatorEstimate your monthly mortgage payment from price, down payment, rate and term, with total interest, an amortization table and extra payments.
- Loan calculatorWork out the monthly payment and total interest on any fixed-rate loan, with the full schedule and what extra payments save.
- Compound interest calculatorSee how savings grow with compound interest and regular deposits, with a year-by-year table, or find the deposit that reaches your goal.
- Discount calculatorFind the sale price after a discount, stack a second discount and add sales tax to see the final price and what you save.
- Tip calculatorWork out the tip and split the bill between any number of people, with the option to round up each share or the total.
- Budget plannerA monthly budget with 50/30/20 and zero-based views, charts and CSV export, kept on your device.
- Invoice makerMake an invoice with your logo, tax, a payment QR code and numbering, track what is unpaid, and download a clean PDF.
- Quote makerMake a quote or estimate as a clean PDF, then turn it into an invoice in one click.
- TimesheetTrack time with a timer or by hand, round it and add the hours to an invoice.
- Expense ledgerAdd receipts, sort them by category and month, and export a CSV or an expense report PDF.
- Income trackerPayments owed and paid by client and month, with your invoices brought in and tax set aside.
- Freelance income trackerTrack freelance payments by client and month: what is owed, what is overdue and what came in this year, with tax set aside and your invoices brought in.
- Salary calculatorSalary to hourly and back, a simple take-home pay estimate, sales tax and percentage change.
- Salary to hourly calculatorConvert a yearly salary to an hourly rate, or an hourly wage to a yearly salary, using your own hours per week and weeks worked.
- Take-home pay calculatorEstimate take-home pay from your gross pay and the tax and deduction rates you enter.
- Sales tax calculatorAdd sales tax to a price or work out the price before tax from a total.
Dates and time
- Age calculatorFind an exact age in years, months and days, the weekday you were born and the days until your next birthday.
- Date difference calculatorCount the days, weeks, months and business days between two dates, or add and subtract days from a date.
- Time calculatorAdd and subtract hours and minutes, find the time between two times even past midnight, and add a duration to a clock time.
- Time zone converterSee one time in every city you add, daylight saving included, with a meeting planner.
- Meeting plannerLine up working hours in several cities and see where they overlap.
Everyday sums
- Percentage calculatorWork out X% of a number, what percent one number is of another, percentage change and reverse percentages, with the formula shown.
- Unit converterConvert length, mass, volume, temperature, area, speed, data, energy, pressure and fuel economy with exact factors.
- BMI calculatorCalculate BMI in kg and cm or pounds, feet and inches, with the WHO adult category and healthy weight range for your height.
- GPA calculatorCalculate your GPA on the 4.0 scale from grades and credits, with Honors and AP weighting and your cumulative GPA.
- Random generatorFair random numbers, dice rolls, coin flips and list picks from your browser's secure source.
- Dice rollerRoll any number of dice with a total and modifier.
- Coin flipFlip one coin or a thousand and keep a running tally of heads and tails.
- Percentage change calculatorFind the percentage increase or decrease from an old value to a new one, and the percentage difference between two numbers.
Health
- Calorie calculatorEstimate daily calories with BMR and TDEE, and body fat with the US Navy method.
- TDEE calculatorEstimate your total daily energy expenditure from age, height, weight and activity with the Mifflin-St Jeor equation.
- Body fat calculatorEstimate body fat percentage from height, neck, waist and hip measurements with the US Navy formula, in centimetres or inches.
Charts
- Bar graph makerCreate a bar graph from CSV or cells copied from Excel or Google Sheets.
- Line graph makerPaste dates and values to make a line graph online.
- Pie chart makerMake a pie or donut chart from pasted data or a CSV file.
- Scatter plot makerMake a scatter plot from two numeric columns.
- Graphing calculatorPlot y = f(x), pan and zoom, trace values, and find roots and intersections.
Algebra
- Equation solverSolve linear, quadratic, cubic and polynomial equations and linear systems, with every step shown.
- Matrix calculatorDeterminant, inverse, RREF, rank, LU and eigenvalues up to 8x8, in exact fractions with steps.
- Calculus calculatorIntegrals, derivatives and limits with every step shown, plus a graph.
- Integral calculatorIntegrate any function with every step shown: substitution, integration by parts, partial fractions and trig identities.
- Derivative calculatorDifferentiate any function and see each rule applied: power, product, quotient and chain rules, exponentials, logs and trig.
- Limit calculatorFind limits with the working shown: direct substitution, factoring, conjugates, L'Hopital's rule and limits at infinity.
Geometry
- Geometry calculatorSlope, distance and midpoint, the Pythagorean theorem, and the area and volume of common shapes.
- Slope calculatorEnter two points to get the slope, the line equation, the distance between them, the midpoint and the angle, with every step shown.
- Pythagorean theorem calculatorFind the hypotenuse or a missing leg of a right triangle with a squared plus b squared equals c squared, plus its angles and area.
- Area calculatorWork out the area of rectangles, triangles, circles, trapezoids, parallelograms and ellipses in any unit, with the formula shown.
- Volume calculatorWork out the volume and surface area of cubes, boxes, cylinders, spheres, cones and pyramids, with the formula shown and litres too.