All Calculators

Monthly payment and total interest on a manufactured or mobile home loan, including what the chattel-versus-real-property split does to the numbers.

Calculate compensable teacher overtime in North Rhine-Westphalia per Unterrichtsstunde (45-min lesson), based on the de minimis threshold (Bagatellgrenze), your part-time status, and the NRW per-lesson rate for your Lehramt.

Enter the price, the deposit, the rate and the term to see the full monthly housing payment — principal, interest, property tax and insurance in one figure.

Calculate pay period end dates and FLSA-compliant pay dates with automatic Federal Reserve holiday adjustment for weekly, bi-weekly, semi-monthly, and monthly payroll schedules.

Calculate exactly when your next direct deposit clears with Federal Reserve holiday adjustments and early-deposit offsets.

Discount a future lump sum and any regular future payments back to today's money, with the discount applied and the nominal total, at monthly, quarterly, or annual compounding.

Calculate the exact date and estimated net payout for your 25, 40, or 50-year public service anniversary bonus in Germany (TVöD/Beamte) and Austria.

Estimate how many years it takes for money to double, triple, or quadruple at a fixed annual rate, and compare the Rule of 72 shortcut with the exact doubling time.

Enter the price, the deposit, the rate and the term to see what a motorhome or caravan costs each month — and what the long term costs in interest.

Calculate the required salary reduction and working phase duration for your sabbatical using the block part-time model (Ansparmodell).

Convert any gross pay amount between pay periods — hourly, daily, weekly, biweekly, monthly, or annual. See all equivalent rates instantly.

Estimate Steam game revenue from review count using the Boxleiter method.

Find the taxable yield a bond must offer to match a tax-free municipal bond after tax, from the tax-free yield and your tax bracket.

Calculate exact net salary loss, adjusted substitution thresholds, and effective hourly rates when reducing teaching workload as a civil servant.

Calculate exact travel expense reimbursements for school trips and training, including mileage allowances and BRKG meal deductions.

Calculate the exact tip amount, total bill, and per-person split instantly.

Calculate net pay for public sector teachers (TV-L). Includes exact VBL deductions, social security, and Christmas bonus for E11-E13 pay grades.

Estimate your relocation reimbursement (Umzugskostenvergütung) according to the German BUKG, including the 60-minute commute reduction rule and flat rates.

Add VAT to a net amount or extract VAT from a gross amount. Covers statutory rates for Germany (19 %, 7 %), Austria (20 %, 10 %, 13 %), and Switzerland (8.1 %, 2.6 %, 3.8 %) plus a custom rate.

Calculate when to stop exploring and start committing with the 37% optimal stopping rule.

Calculate the posterior probability P(A|B) with Bayes' theorem from a prior P(A) and the two likelihoods P(B|A) and P(B|¬A).

Calculate the binomial probability P(X = k) = C(n, k) · pᵏ · (1 − p)^(n − k) — the chance of exactly k successes in n independent trials each with success probability p.

Calculate the coefficient of variation from a mean and a standard deviation — CV% = (σ ÷ μ) × 100.

Calculate the number of combinations C(n, r) — how many ways to choose r items from n when order does not matter, using C(n, r) = n! ÷ (r! × (n − r)!).

Calculate the number of combinations with repetition C(n + r − 1, r) — how many ways to choose r items from n distinct types when repeats are allowed and order does not matter.

Calculate the conditional probability P(A|B) = P(A∩B) ÷ P(B) — the probability of event A given that event B has occurred.

Calculate the margin of error and the confidence interval for a mean from the sample mean, standard deviation, sample size, and z critical value.

Calculate the geometric distribution probability that the first success occurs on trial k — P(X = k) = (1 − p)^(k − 1) × p.

Calculate LIX, Flesch Reading Ease, and WSTF scores to evaluate text readability.

Calculate the margin of error for a proportion from the sample proportion p, the sample size n, and a z-score — MoE = z × √(p(1 − p) ÷ n) × 100.

Calculate the odds ratio (OR) from a 2×2 contingency table — OR = (a × d) ÷ (b × c) — to compare the odds of an outcome between two groups.

Convert odds such as 1 to 4 into a probability instantly. This odds to probability calculator returns both a percentage and a decimal probability value.

Convert a z, t, chi-square, or F test statistic into its exact p-value and check significance at your alpha level.

Calculate the number of permutations P(n, r) — how many ways to arrange r items chosen from n when order matters, using P(n, r) = n! ÷ (n − r)!.

Calculate the number of ordered selections n^r — how many arrangements of r positions you can make from n distinct items when items may repeat.

Calculate the Poisson probability P(k; λ) = (λ^k × e^(−λ)) / k! of exactly k events in a fixed interval from the average rate λ.

Calculate the probability of the union of two events with the addition rule, P(A∪B) = P(A) + P(B) − P(A∩B).

Calculate the sample size needed for a survey or poll from your confidence level (z-score), expected proportion, and margin of error: n = (z²·p·(1−p))/E².

Calculate the standard error of the mean from standard deviation and sample size. Supports bidirectional solving.

Convert a raw score or a z-score into a T-score on the 50 ± 10 metric and see the matching percentile.

Calculate the one-sample t-statistic, t = (x̄ − μ) / (s / √n), from a sample mean, hypothesized population mean, sample standard deviation, and sample size.

Calculate a z-score from a raw value, the mean, and the standard deviation — z = (x − μ) ÷ σ.

Convert any monthly USD budget into concrete engineering output across 25 popular AI coding models.

Calculate the bandwidth-delay product (BDP) of a network link from its bandwidth in Mbit/s and round-trip latency in ms — the data volume kept in flight and the ideal TCP window size.

Calculate the Base64-encoded size (ceil(n / 3) × 4 bytes) produced when you encode a given number of input bytes, including padding.

Calculate the minimum number of bits needed to represent N distinct values (bits = ⌈log₂N⌉) from how many values you have.

Calculate how many distinct colors a given color depth can represent (colors = 2^bits), from 8-bit to 24-bit true color and beyond.

Calculate the data compression ratio (original size ÷ compressed size) and the space savings percentage from an original and a compressed file size.

Calculate a display's dot pitch in millimetres from its pixel density (dot pitch = 25.4 / PPI) to see how finely a monitor or screen resolves detail.

Estimate how long a file takes to download at your connection speed, with the bits-vs-bytes conversion handled for you and the time shown in minutes and seconds.