Example
5:00Pace per kilometre
| Distance (selected split unit) | Elapsed time |
|---|---|
| 1 km | 0:05:00 |
| 5 km | 0:25:00 |
| 10 km | 0:50:00 |
Distance10 km
Finish time0:50:00
CALCDELTA / Everyday decisions, verified formulas
Everyday decisions, verified formulas
Clear answers for payments, savings, health and everyday maths. Verified formulas and assumptions on every page—no account required.
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Example
Total depositedFinal balance
Final balance37,405.09
Final balance · B54,713.58
Initial amount: 10,000 · Annual interest rate: 7% · Years: 10 · Recurring deposit: 100 / Monthly · Recurring deposit · B: 200 / Monthly
Compound Interest Calculator
Project growth with regular deposits, compare two scenarios, and separate contributions from interest.
Try this exampleExample
Team 1RileySamJordan
Team 2MorganAlexCasey
Total players6
People per team3 / 3
Random Team Generator
Split players into random teams and nominate a captain for each side.
Try this exampleWhat would you like to calculate?
Useful everyday tools
All calculators →- Age CalculatorFind your age in years, months and days from your date of birth and a reference date.
- Percentage CalculatorSolve any percentage question: what percent, X% of Y, reverse percent, percent change, or increase by a percent.
- Mortgage CalculatorEstimate principal, interest, property tax, homeowners insurance, PMI and HOA fees, then see how extra payments change payoff time and interest.
- Tip CalculatorWork out the tip and split the bill between any number of people.
- BMI CalculatorFree BMI calculator.
- Sales Tax CalculatorAdd sales tax to a price, or work backwards from a tax-inclusive total to find the original price.
Browse by category
All calculators →691 calculators · 33 categories
Money-over-time arithmetic: compound interest, amortisation schedules, APR, annuities, break-even points and investment returns.
Body metrics and reference ranges: BMI, blood pressure categories, HbA1c conversion, calorie and alcohol estimates, and growth percentiles.
Unit and physical-quantity conversions: length, area, volume, mass, temperature, speed, pressure, data size and angles.
Calendar arithmetic: adding days or working days, countdowns, ages in days, business-day spans and time-of-day sums.
Kitchen measurement: baker's percentages, dilution and ABV, altitude adjustments for baking, grilling times, yields and pan conversions.
Sizing and running-cost estimates for home equipment: room-size matching, appliance wattage and energy use, battery runtime, burn times and fixture sizing.
Explore 25 more categories
Running costs and performance for a car: depreciation, lease and insurance estimates, fuel spend, brake and tyre wear, and acceleration figures.
Feeding amounts, habitat sizing and life-stage estimates for cats, dogs, fish and small animals: tank volume, cage dimensions, portion sizes, litter and gestation timelines.
Quantities for beds, water and feed: soil volume, compost ratios, fertiliser rates, drip-irrigation run times, plant spacing and expected yield.
Performance statistics and scoring: batting and bowling averages, free-throw percentage, run rates and game scoring.
Time and output costs: billable hours, effective hourly rate, commute cost, bandwidth and transfer times, character counts and AI token spend.
Trip planning arithmetic: drive times, flight and airport connection buffers, cruise and accommodation cost comparison, currency exchange and per-person splits.
Whether a deal is actually a deal: unit-price comparison, bulk versus single, cashback and discount stacking, cost per wear, and rent-versus-buy over a period.
Sizing across charts and regions: clothing, dress, bra, belt and glove conversions, plus body-measurement estimates.
The miscellaneous daily estimates that do not belong anywhere else: ages and intervals, aspect ratios, DPI and PPI, large-number intuition and rough carbon footprints.
Meteorological formulas: dew point, heat index, humidity relationships, barometric pressure conversion and growing-season length.
Textbook physics and chemistry: dilution, half-life, heat transfer, friction, ideal-gas behaviour and kinematics.
Exposure and optical geometry: depth of field, field of view, crop factor, focal-length equivalents, ND-filter stops and file sizes.
Tempo and timing for musicians: BPM and delay or reverb times, metronome subdivision, fret spacing and string tension.
Volume and weight for shipping and relocations: cargo and container volumes, dimensional weight, pallet counts, box quantities and truck sizing.
Engagement and earnings rates: engagement percentage by platform, influencer rate estimates, content ROI and hashtag suggestion.
Tabletop and settings arithmetic: dice notation and probability, character ability scores, encounter budgeting, sensitivity conversion and coin-flip simulation.
Novelty calculations: name suggestions, birthday probabilities, board-game scoring, coin values and planetary ages.
Planning quantities for events: guest counts, food and drink per head, balloon and decoration counts, seating and timing.
Materials and yardage for making things: 3D-print cost and filament, candle wax and fragrance ratios, crochet and cross-stitch counts, fabric and thread requirements.
Cleaning costs and consumables: carpet and house-cleaning estimates, laundry running cost, pressure-washer requirements and bag sizing.
Inferential statistics: confidence intervals, correlation, linear regression, chi-square, margin of error and p-values.
Classical plane and solid geometry: circles, triangles, cylinders, cones, pyramids and the Pythagorean relation.
How it works
- 1 Enter your values
- 2 Result
- 3 Copy link
Selected tools include worked steps, comparisons or downloadable result images.
How the answers are made
Calculations run in your browser. Pages show worked examples and assumptions; reviewed calculators link to the source for their formula or reference values. Check the limits before using a result for health or finance.
CalcDelta
Calculators for everyday decisions. Each page shows the formula and assumptions so you can check the result before you use it.
Available tools and features vary by language. Switch languages to explore another version.
Frequently asked questions
Are the calculators free?
100% free
Do I need an account?
No sign-up
How are results calculated?
Calculations run in your browser. Pages show worked examples and assumptions; reviewed calculators link to the source for their formula or reference values. Check the limits before using a result for health or finance.
Can I share a calculation?
Selected tools include worked steps, comparisons or downloadable result images.
Is every tool available in every language?
Available tools and features vary by language. Switch languages to explore another version.