Sale Discount & Final Price Calculator
Calculates the discounted final price, savings amount, and effective discount percentage for a sale item.
Tipping, cooking, travel, and other useful little tools.
The calculators that come up in day-to-day life — tip splitting, cooking conversions, fuel costs, and trip planning.
Calculates the discounted final price, savings amount, and effective discount percentage for a sale item.
Calculates the annual fuel cost of a daily commute and potential savings from reducing trips, carpooling, or switching t...
Compares unit prices of two products (price / quantity) to identify the better deal and shows percentage savings.
Calculate miles per gallon (or L/100 km) from the distance driven and the fuel used to cover it.
Calculates concrete volume = length × width × depth (m³), weight ≈ 2400 kg/m³, and number of 20 kg or 25 kg bags needed,...
Calculates mulch volume = area × depth, and bags needed = volume / bag_volume. A standard bag is typically 50 L (0.05 m³...
Work out the sale price and the amount you save from an original price and a discount percentage.
Calculates total paintable wall area for a room and number of paint tins needed given room dimensions, coverage rate, an...
Estimates the BTU/hour cooling capacity needed to air-condition a room from its area, ceiling height, insulation, and cl...
Calculates the monthly deposit needed to reach a savings goal in a given number of years at a specified annual interest...
Estimates Blood Alcohol Concentration (BAC) using the Widmark formula from number of drinks, body weight (lbs), sex-spec...
Calculates annual water consumption and electricity cost of a washing machine from loads per week, water usage per load,...
Calculates concrete volume for a rectangular slab: yd³ = L(ft) × W(ft) × D(in) / 324, or m³ = L × W × D (metric). Also e...
Estimates the maximum mortgage loan a household can afford from their maximum monthly payment, interest rate, and loan t...
Calculates carpet or flooring area needed for multiple rooms including a user-defined waste percentage, and estimated to...
Calculates gravel volume (m³) = length × width × depth, weight = volume × bulk density (typically 1500–1700 kg/m³), and...
Calculates a weight-based medication dose (e.g. mg/kg) and checks it against a maximum dose ceiling. Used for paediatric...
Calculates calories from alcohol: Cal = volume(mL) × ABV/100 × 0.789 × 7.1 kcal/g, plus calories from carbohydrates if k...
Calculate selling price from cost plus markup, or derive markup and margin from cost and selling price.
Estimates the number of bricks: count = wall area / (brick face area × (1 + waste%)). Standard brick face = 0.015 m² (75...
Calculates how long sunscreen protects skin from UV-B burns. Multiply your unprotected skin burn time by the SPF factor...
Estimates the heating BTU/hour required for a room or home from floor area, temperature difference, and insulation quali...
Scales recipe ingredients proportionally when changing the number of servings, with a conversion factor shown for quick...
Calculates floor area (m²) = length × width, adds waste % allowance, and computes number of rolls needed from the standa...