All Free Online Calculators
Browse the full collection of free calculators for finance, health, math, conversions and everyday decisions. Search instantly or jump straight to a category.
Hourly rate you need to charge to reach your income goal.
Daily calories and cups of food for a dog by weight and life stage.
Daily calories and cups of food for a cat by weight and life stage.
Daily, monthly, and yearly food cost plus how long a bag lasts.
How many weeks a pet needs to reach its target weight at a safe weekly pace.
Estimate how much a puppy will weigh when fully grown.
Convert your cat's age to human years and see its life stage.
How much water a dog or cat needs each day by weight.
Water volume of a rectangular tank in liters and gallons.
Rough number of small fish a tank can hold using the inch-per-gallon rule.
How much water to replace to bring nitrate down to your target.
Heater wattage needed to warm a tank from room temperature.
Scale a water conditioner or medication dose to your tank volume.
Pump or filter flow you need for the tank size and turnover you want.
Total loaded weight of a tank and the load it puts on the floor.
Monthly, yearly, and lifetime cost of owning a pet.
Compare your yearly cost with and without pet insurance.
How many treats fit in your pet's daily calorie budget.
Minimum crate length and height for your dog.
Total cost of boarding one or more pets, with a multi-pet discount.
Daily, monthly, and yearly hay for one or more horses.
Gross and net rental yield from price, rent, and expenses.
Capitalization rate and implied value of an income property.
Yearly cash flow as a percentage of the cash you put into a rental.
Monthly and yearly cash flow after every cost of a rental.
GRM of a rental and its value at the market multiplier.
Check a rental against the 1% and 2% rules of thumb.
Debt service coverage ratio and the largest loan your income supports.
Down payment, closing costs, and total cash needed to buy a home.
Estimate buyer closing costs from the loan and the price.