Online Calculators & Tools

Plan effort value training: battles to a target EV with Pokerus, items and vitamins, the 510 and 252 caps, and what a spread is worth in stat points.

Work the PSI or PORT score for community-acquired pneumonia: twenty weighted items, the risk class I to V and the cohort mortality behind it.

Turn a radar reading into what the hitter actually faces: effective velocity from the release point, travel time to contact and the reaction window.

Present value of an endless payment stream from PV = C / r, the growing form C / (r - g), and the reverse solves for the payment or the implied return.

Score a women's indoor pentathlon on the World Athletics tables: 60 m hurdles, high jump, shot put, long jump and 800 m, event by event.

Predicted peak flow from height, age and sex using the Nunn and Gregg 1989 equations, plus the percentage of personal best and the green, yellow and red bands.

Add up a PC build from your own part prices with tax, shipping and rebates, see where the money goes, and what the machine costs a month to actually own.

Runs a paired-samples t-test on the raw before and after columns, returning the differences, t, both p-values, a confidence interval and the effect size.

See what rolling negative equity into a new car loan really costs a month, and which month the new loan finally drops below what the car is worth.

Open channel flow by Manning's equation for rectangular, trapezoidal, triangular and part-full circular sections, with normal depth solved iteratively.

Solve a linear program two ways: two variables with the feasible region drawn and the optimum at a vertex, or the simplex tableau with every pivot shown.

Prices an insulation job from the area and the R-value you want, and lines up nine materials at the same R so depth and cost can be compared properly.

Gravitational force between two masses, surface gravity and escape velocity from a mass and radius, and the speed and period of a circular orbit.

Divide GDP by population, strip price change out with a deflator, split growth into output and people, and convert to international dollars.

Fall time, distance and impact speed for a drop under gravity, in a vacuum or with air resistance and a terminal velocity worked in.

How much of a dose is left after a given time at a stated half-life, and how far repeated dosing builds up before it levels off.

Offset, three point saddle and stub up marks for conduit, with the bender multipliers and the shrink that has to be added before you mark.

Work out the early withdrawal penalty on a CD, what you actually walk away with, and the month at which cashing it in stops eating part of your deposit.

Tubes of caulk from the width, depth and length of the joint, with the sealant depth and the backer rod size that joint should have.

Score a whitetail rack on the Boone and Crockett chart, typical or non-typical, with every right-to-left deduction shown line by line.

Exact two-pulley belt length from both diameters and the centre distance, with wrap angles, straight spans and a scale drawing, plus the centre distance for a belt you already own.

Work out the magic number for the team in front, the elimination number for the team behind, and the division magic number against every rival at once.

Bat length as a range from both the age chart and the height chart, plus the drop, the ounce range and the certification your league requires.

Score the ten activities of daily living on the Barthel Index, from feeding to stairs, and get the total out of 100 with the dependence band it falls in.

Work out acres covered per hour from implement width, ground speed and field efficiency, then turn it around for the hours a field takes or the width a deadline needs.

Astable frequency, period and duty cycle from R1, R2 and C, monostable pulse width from R and C, and the reverse solve with nearest E12 and E24 values.

Balanced three-phase power from the impedance of one winding, in wye or delta, keeping line and phase voltage and current apart and showing where the 1.732 factor belongs.

Converts watt hours to milliamp hours at a voltage you supply, and restates a mAh rating at a different voltage with converter losses allowed for.

Works out the water standing in a cased well from the casing bore, the total depth and the static water level, with gallons per foot and the purge volume.

Project a Thrift Savings Plan balance with the real agency contribution: the automatic 1%, the two-step match, and what front-loading the limit costs you.

Thrift Savings Plan loan payments at the G Fund rate, the three tests that set the maximum you may borrow, and what the loan really costs your account.

Type a balanced equation and the amount of one species, and get every other species in moles and grams, with the mole ratio and the limiting reagent.

Baker's percentage for sourdough bread, with the levain's own flour and water taken out of the weigh-out, plus bulk timing and water temperature.

Score a reading running record: accuracy rate, error rate as a 1:N ratio, self-correction rate and the independent, instructional or frustration band.

Find the root mean square of a list of numbers, or convert between the RMS, peak, peak-to-peak and average values of a sine, square, triangle or rectified waveform.

Work out the required minimum distribution from a traditional IRA or workplace plan using the IRS Uniform Lifetime Table, and project the distributions forward.

Left, right, midpoint and trapezoidal sums for one integrand at once, with the strips drawn, the exact value from the antiderivative and each rule's error.

Decide whether a number is rational or irrational, with the exact fraction when it is one and the named theorem when it is not.

Work out the range, maximum height, flight time and trajectory of a projectile, with or without a launch height, and find the angle or speed that hits a target.

PCR primer Tm by nearest-neighbour thermodynamics, with the 2 + 4 Wallace rule and the GC formula printed beside it so the gap between them is visible.

Find the sample size a study needs, or the power it already has, for comparing two means or two proportions, using the noncentral t distribution rather than a shortcut.

Price a plumbing job from the fixture count, separate rough-in and finish rates, pipe runs, permits and markup, or work out what a single service call should come to.

Solves Darcy-Weisbach backwards: the water flow a pipe passes for the pressure you have, or the bore a target flow needs inside a loss budget.

Find the outliers in a list by the IQR fence rule, the z-score, the modified z-score on the MAD and Grubbs' test, and see where the four disagree.

Old School RuneScape combat level from your seven stats, with the working shown and the exact levels needed to reach the next combat level.

Odds ratio from a 2 x 2 table with the log-scale confidence interval, the Haldane correction for an empty cell, and the relative risk printed beside it.

Occupant load from floor area using IBC 2021 Table 1004.5 factors, with the exits, egress width and corridor width that load requires.

Simulates thousands of retirement drawdowns with volatile returns and reports the whole percentile band, not just a success rate. Same inputs, same answer.