All Calculators

Project the future value of a starting amount plus regular contributions, with the interest earned and total paid in, at monthly, quarterly, or annual compounding.

Estimate the monthly payment, total interest, and amount financed on a land or lot loan — with the down payment and rate you choose.

Calculate your exact net salary as a German civil servant or teacher (A12/A13). Compare state differences, family allowances, and calculate your true net income.

Calculate compensable teacher overtime and substitution hours based on the de minimis threshold (Bagatellgrenze) and part-time status.

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.

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

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.

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.

Work out how much ground coffee to use for any amount of water at your chosen brew ratio (1 : X), from strong 1:15 to mild 1:18.

Convert cups, ounces, grams, ml and more — with ingredient-aware density for 15 baking staples.

Work out the exact flour, water, salt, and yeast weights for any number of pizza dough balls using baker's percentages.

Scale any recipe up or down — enter an ingredient amount and your original and desired servings to get the rescaled amount and the scaling factor.

Find out how long to roast a turkey at 325°F — enter the weight and whether it is stuffed to get the total roasting time in hours and minutes.

Estimate the calories you burn cycling using the MET method, from your body weight, riding speed, and ride length — plus the distance covered and the MET intensity.

Calculate your Basal Metabolic Rate using the Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle equation — plus your activity-adjusted daily calorie needs.

Estimate your body fat percentage using the US Navy circumference method.

Check your Body Mass Index for insights into your health.

See how many calories any activity burns — by duration, distance, steps, or reps.

Estimate total body water and the free water deficit used to correct hypernatremia, from weight, patient group, and serum sodium.

Calculate the HOMA-IR insulin resistance index from fasting glucose and insulin, in mg/dL or mmol/L, with an interpretation band.

Solve any one of pace, time, or distance from the other two. Plan your race or training run.

Calculate prostate volume from three ultrasound or MRI dimensions using the ellipsoid formula, plus estimated gland weight and PSA density.

Estimate the calories burned rucking (walking with a loaded pack) using the Pandolf equation, from your body weight, load, speed, grade, terrain, and time.