All SpecWhale tools

Estimate annual impact of an extra monthly mortgage payment.

Convert a monthly payment into equivalent biweekly payments.

Convert annual percentage rate to a monthly periodic rate.

Estimate inflation-adjusted real return from nominal return and inflation rate.

Calculate dividend yield from annual dividend and share price.

Estimate annual and monthly property tax from assessed value and tax rate.

Estimate monthly escrow from annual taxes and insurance.

Estimate daily calorie target from maintenance calories and desired deficit.

Estimate weeks to target weight from weight change and weekly pace.

Estimate miles from steps and stride length.

Predict race time from a known distance and time using the Riegel formula.

Estimate body surface area using the Mosteller formula.

Estimate grass seed needed from lawn area and seeding rate.

Estimate fertilizer amount from area and application rate.

Estimate number of concrete bags needed from cubic yards and bag yield.

Estimate bricks needed from wall area and bricks per square foot.

Calculate lumber board feet from thickness, width, length, and quantity.

Calculate cubic yards from length, width, and depth in feet.

Estimate rainwater collection from roof area and rainfall.

Calculate air changes per hour from airflow and room volume.

Estimate heat loss from U-value, area, and temperature difference.

Calculate hypotenuse from two right-triangle legs.

Calculate weighted average from three values and weights.

Calculate z-score from value, mean, and standard deviation.

Estimate margin of error for a proportion from sample size and confidence z-score.

Estimate sample size for a proportion from confidence z-score and margin of error.

Calculate final value from starting value, growth rate, and periods.

Calculate logarithm of a value with a chosen base.

Interpolate y at x from two known points.

Calculate molarity from moles of solute and liters of solution.

Calculate final concentration after dilution.

Estimate travel time from distance and average speed.

Calculate average miles per day for a road trip.

Split hotel cost across nights and people.

Calculate hour difference between two UTC offsets.

Estimate baggage fees from bag count and manually entered fee per bag.

Find the original price before a known discount was applied.

Convert centimeters to millimeters instantly (1 cm = 10 mm), free and accurate.

Convert millimeters to centimeters instantly (1 mm = 0.1 cm), free and accurate.

Convert meters to kilometers instantly (1 m = 0.001 km), free and accurate.

Convert kilometers to meters instantly (1 km = 1.0000e+3 m), free and accurate.

Convert feet to yards instantly (1 ft = 0.333333 yd), free and accurate.

Convert yards to inches instantly (1 yd = 36 in), free and accurate.

Convert square inches to square feet instantly (1 in² = 0.00694444 ft²), free and accurate.

Convert square feet to acres instantly (1 ft² = 2.2957e-5 acre), free and accurate.

Convert gallons to quarts instantly (1 gal = 4 qt), free and accurate.

Convert quarts to cups instantly (1 qt = 4 cup), free and accurate.

Convert pints to cups instantly (1 pt = 2 cup), free and accurate.

Convert cups to tablespoons instantly (1 cup = 15.9999 tbsp), free and accurate.

Convert kilograms to ounces instantly (1 kg = 35.274 oz), free and accurate.

Convert ounces to kilograms instantly (1 oz = 0.0283495 kg), free and accurate.

Convert grams to milligrams instantly (1 g = 1.0000e+3 mg), free and accurate.

Convert milligrams to grams instantly (1 mg = 0.001 g), free and accurate.

Convert days to hours instantly (1 day = 24 h), free and accurate.

Convert seconds to minutes instantly (1 s = 0.0166667 min), free and accurate.

Search common SI prefixes, symbols, and powers of ten.

Search resistor color bands and digit values.

Search common HTTP request methods and uses.

Search common Markdown syntax patterns for headings, links, lists, and more.

Search common regular expression tokens.