Online Calculators & Tools

Hits divided by at-bats, printed the way a box score does, with slugging, on-base percentage and OPS from the same line and the hits needed for a target average.

Runs the arithmetic on a blood gas report: Henderson-Hasselbalch, the anion gap with and without albumin correction, the delta ratio and expected compensation.

Estimates the cooling load of a house in BTU per hour and turns it into air conditioner tons, using the square-foot rule with climate and insulation factors.

Narrows a built-in list of common five-letter words down to the ones that still match your green, yellow and grey tiles, then ranks what to guess next.

Win percentage from wins, losses and ties under all three tie conventions, plus the run of straight wins it takes to reach a target percentage.

Estimates the daily calories needed to gain weight at a rate you choose, and how long a goal weight takes at a given surplus. An estimate, not dietary advice.

Work out a weighted average cost of capital from the market value of equity and debt, the cost of each and the corporate tax rate.

Converts a signed decimal to its two's complement bit pattern and reads a pattern back again, at 4 to 64 bits, in binary and hex, stating any overflow.

Works out where a TV goes on the wall from the screen size, your seated eye height and the seating distance, with the vertical viewing angle checked.

Does the towing arithmetic on ratings you read off your own vehicle: GCWR minus the loaded vehicle, payload against tongue weight, and the limit that bites first.

Turns a step count into calories from your step length and body weight rather than a flat per-step figure, at the walking pace you pick.

Parlay payouts, the stake that hedges a bet you already hold, and how much margin a two-sided market carries, all from American odds.

Bedtimes for a wake-up time, wake times for a bedtime, and the hours between the two, all worked out in whole sleep cycles.

Itemises what a home seller pays at closing: commission, transfer tax, title, escrow, attorney, prorated tax and buyer credits, with the total as a share of the price.

Works out how many recessed cans a room needs and how far apart they go, either from the ceiling height rule or from the light level the room calls for.

Turns engine output and vehicle weight into hp per pound, pounds per horsepower, hp per ton and watts per kilogram, and puts two vehicles side by side.

Works out how many sheets of plywood or OSB an area needs, from length and width, a square footage or the walls of a room, with waste and cost.

Works out the NFL passer rating from attempts, completions, passing yards, touchdowns and interceptions, and shows all four capped components.

Estimates what painting a room costs from its dimensions, the coats and your own paint and labour prices, with openings deducted and the extras named.

Evaluates an expression by PEMDAS or BODMAS and lists every operation in the order it was applied, including what a plain left to right reading would give instead.

Compares a mortgage quoted with discount points against the same loan without them: what the points cost, the monthly saving and the break-even month.

Works out mileage reimbursement from miles driven at a rate you enter, from a trip, a pair of odometer readings, or against a second rate for comparison.

Estimates an LSAT scaled score from a raw score or from the three scored sections, using one stated linear rule and saying where that rule falls short.

Sizes life cover by the DIME method or a stated multiple of income, showing debt, income replacement, mortgage and education as separate components.

Estimates fat-free mass from height, weight and sex with the Boer, James and Hume equations, reports all three plus the average, and shows how far apart they land.

Builds ketogenic macros the way the diet actually works: carbohydrate capped in grams, protein set from lean body mass, and fat taking the calories left over.

Shows what an interest-only mortgage costs each month and how far the payment jumps once the interest-only period ends and the balance has to be repaid.

Evaluates definite integrals of polynomials by the power rule and of a fixed list of standard forms, showing the antiderivative and both limits.

Add, subtract, multiply, divide or raise whole numbers, negative ones included, with the sign rule spelled out and a quotient and remainder for uneven division.

Running and starting watts for a generator, summed from the appliances you list, with the surge multipliers named and the amps at 120 V and 240 V.

Estimates the furnace size a home needs in BTU, from floor area and climate zone with insulation and ceiling height, or from a heating load you already have.

Prices a fence from figures you enter, either as an installed rate per foot or line by line across posts, panels, concrete, gates, labour and tax.

Counts posts, sections, rails and panels for a fence from the run length, post spacing and gate openings, and counts pickets from board width and gap.

Works out a pitcher's earned run average from earned runs and innings pitched, reading the innings the way a box score writes them.

Whelping date for a pregnant dog from the mating, ovulation or LH surge date on the published 63 day canine average, with the likely window and the scan dates.

Daily calories and the cups or grams of your own food for a dog, from weight and life stage, using the published RER = 70 x kg^0.75 energy formula.

Find the dew point from air temperature and relative humidity, or run it the other way and get humidity from a measured dew point.

Interest for a run of days rather than a run of years, on actual/365, actual/360 or 30/360, either as simple per diem accrual or compounded daily.

Crosswind and headwind components from a runway heading, the wind direction and speed, with a magnetic or true reference and an optional gust figure.

Turns a chart's stitch count into a finished size on Aida, evenweave or linen, and the piece of fabric you need to cut for it.

Concrete volume and the rebar schedule for pad and continuous footings: cubic yards, bags, linear feet of steel and its weight by bar size.

Exact arithmetic on whole numbers of hundreds of digits: add, subtract, multiply, divide with a remainder, raise to a power or take a factorial.

Models an adjustable-rate mortgage through its caps: the starting payment, the worst case at every reset and the highest payment the note allows.

Finds the angle whose cosine is the value you enter, in degrees and in radians, and refuses values outside the -1 to 1 domain with a reason.

Finds the indefinite integral of polynomial terms by the power rule, plus 1/x, e^x, sin, cos and sec squared, and refuses anything outside that list.

The exact gap between two birth dates in years, months and days, both ages on any date, the ratio between them and the day the gap was two to one.

Works out the absolute neutrophil count from the white cell count and the neutrophil percentages on a blood report, in both cells/uL and 10^9/L.

Daily water target from the published Adequate Intake table or from your body weight, in litres, US cups and fluid ounces, with an allowance for exercise.