Reference charts
37 charts, each one a table you can read off or print. Same formulas and same sources as the calculators — laid out for looking up rather than typing into.
Construction & Home
- Concrete for a 10 × 10 Slab by ThicknessCubic yards and bag counts for a 100 sq ft slab at every thickness from 2 to 12 inches, including a 10% waste allowance. 11 rows.
- Roof Pitch Multiplier ChartHow much bigger a sloped roof is than the footprint under it. 24 rows.
- Gravel Tonnage by Depth ChartCubic yards and tons of gravel for a 200 sq ft area at depths from 1 to 12 inches. 12 rows.
- Asphalt Tonnage by Thickness ChartTons of hot-mix asphalt for a 480 sq ft driveway at compacted thicknesses from 1 to 8 inches. 11 rows.
- Rebar Grid Spacing ChartBar counts, linear feet and weight of #4 reinforcement in a 20 × 12 ft slab at grid spacings from 4 to 24 inches. 10 rows.
- CFM by Room Size ChartAirflow in cubic feet per minute for rooms from 8 to 30 feet long at a 12 ft width and 8 ft ceiling, at four air changes an hour. 12 rows.
Finance
- Mortgage Payment by Interest Rate ChartMonthly principal and interest on a $400,000 30-year loan at every eighth of a point from 3% to 9%, with the lifetime interest beside it. 49 rows.
- Compound Growth Chart$10,000 plus $500 a month at 7%, year by year for forty years, split into what you contributed and what compounding added. 40 rows.
- Loan Payment by Term ChartWhat $32,000 at 7.5% costs per month across terms from 12 to 96 months, with total interest. 15 rows.
- Extra Mortgage Payment ChartWhat each extra $25 a month does to a $420,000 loan at 6.125% over 30 years: the payoff date, the interest saved, and the months cut off the term. 24 rows.
- APY by Interest Rate ChartWhat every nominal rate from 0.25% to 8% becomes as an APY when compounded daily, and what it earns on $10,000 over a year. 28 rows.
- Car Loan Payment by Term ChartMonthly payment and total interest on the same car at every term from 24 to 96 months, at 7.2%. 7 rows.
- Debt-to-Income Chart by Monthly IncomeThe largest housing payment that still clears 43% and 50% back-end DTI, at every income from $3,000 to $20,000 a month, holding other debts at $950. 22 rows.
- RMD Table by Age — IRS Uniform Lifetime TableThe applicable denominator for every age in the IRS Uniform Lifetime Table, with the share of the balance it works out to and what that is on $500,000. 49 rows.
- PayPal Fee ChartPayPal Checkout fees at the US rate of 3.49% + $0.49, from $1 to $10,000. 28 rows.
- Freight Class Density ChartThe NMFC density bands from class 50 to class 500, and the class a 48 × 40 × 48 in pallet lands in at weights from 50 to 3,000 lb. 12 rows.
Health & Nutrition
- BMI Chart by WeightBody mass index at a fixed height of 5 ft 11 in, from 110 to 260 lb. 31 rows.
- Daily Calories by Body Weight ChartMaintenance calories and a one-pound-a-week target at every 2.5 kg from 60 to 130 kg, for a lightly active 38-year-old man of 178 cm. 23 rows.
- Weight Loss Time by Daily Calorie IntakeHow long 90 kg to 80 kg takes at every intake from 1,400 to 2,350 calories, and the weight each intake eventually settles at. 14 rows.
- Steps to Miles ChartEvery thousand steps from 1,000 to 30,000, in miles and kilometres, for a 5 ft 7 in walker. 22 rows.
- Dog Calorie Chart by WeightDaily calorie needs for a neutered adult dog from 1 to 70 kg, with the resting requirement beside it. 27 rows.
- Puppy Growth Chart by AgeWhat share of its adult weight a medium-breed puppy has reached at each age, and the adult weight that implies for a 5 kg puppy. 20 rows.
- A1C to Blood Glucose ChartEstimated average glucose for A1C values from 4 to 14 per cent, in mg/dL and mmol/L, by the ADAG regression the ADA publishes. 16 rows.
Conversion & Math
- Inch Fraction to Decimal ChartEvery sixty-fourth of an inch as a decimal and in millimeters. 63 rows.
- Centimeters to Feet and Inches ChartHeight in centimeters against feet and inches, one row per centimeter through the usual adult range. 61 rows.
- Circle Area and Circumference ChartArea and circumference for every diameter from 1 to 40 feet. 40 rows.
- Roof Pitch to Angle and Grade ChartEvery roof pitch from 1/12 to 24/12 as an angle in degrees and a percentage grade. 24 rows.
- Fahrenheit to Celsius ChartFahrenheit to Celsius in five-degree steps across the range a thermostat, an oven and a weather forecast actually cover. 59 rows.
- Z-Score to P-Value TableTwo-tailed p-value at every hundredth of a z-score from 0 to 4, computed rather than transcribed from a printed table. 76 rows.
- Final Exam Grade Needed, by Current GradeWhat you have to score on a final worth 30% of the course to finish on 90%, read against the grade you are carrying into it. 29 rows.
- Cups to Grams ChartWhat one cup of each common baking ingredient weighs, from the King Arthur Baking chart. 60 rows.
- Percent Off ChartWhat every common discount comes to on a $100 item, so a sale sign converts to dollars without arithmetic. 18 rows.
- Voltage Drop Chart: 10 AWG Copper at 20 AVoltage lost every 25 feet on a 240 V single-phase circuit in 10 AWG copper carrying 20 A, with the percentage and the voltage still reaching the load. 19 rows.
- Oven Temperature Chart: °F, °C, Gas, FanEvery oven setting from 175 °F to 550 °F in Fahrenheit, Celsius as a recipe writes it, gas mark, and the fan-oven equivalent. 16 rows.
- Minutes to Decimal Hours ChartAll sixty minutes as decimal hours, to two and three places. 60 rows.
- Watts to Amps ChartEvery common wattage at 120 V single phase, unity power factor — the household case. 30 rows.
- mAh to Wh ChartPower bank capacities in mAh converted to watt-hours at the 3.7 V nominal cell voltage. 26 rows.