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Logarithm
Calculate a logarithm with an entered positive base other than one.
Calculate062Everyday & specialist / everyday lifeMap Scale Distance
Convert a distance on a scaled map to real-world distance.
Calculate063Everyday & specialist / homeMaterial Cost
Estimate material purchase cost from quantity, unit price, and fixed delivery.
Calculate064Everyday & specialist / businessMarkup
Calculate a selling price by applying markup to cost.
Calculate065Everyday & specialist / scienceMolality
Calculate molality from solute amount and solvent mass.
Calculate066Everyday & specialist / scienceMoles from Mass
Calculate amount of substance using entered mass and molar mass.
Calculate067Everyday & specialist / scienceMolarity
Calculate molar concentration from solute amount and final solution volume.
Calculate068Everyday & specialist / scienceMomentum
Calculate one-dimensional classical momentum.
Calculate069Everyday & specialist / financeMortgage Payment
Estimate monthly principal and interest for a fixed-rate mortgage.
Calculate070Everyday & specialist / homeMulch
Estimate mulch volume from bed area and desired depth.
Calculate071Everyday & specialist / engineeringOhm’s Law
Calculate current through an ideal resistive element.
Calculate072Everyday & specialist / homePaint
Estimate liters of paint from area, coats, and product coverage.
Calculate073Everyday & specialist / fitnessRunning Pace
Calculate average running pace from distance and elapsed minutes.
Calculate074Everyday & specialist / engineeringParallel Resistance
Find equivalent resistance for two ideal resistors in parallel.
Calculate075Everyday & specialist / homePaver Pack Quantity
Convert a paving area and allowance into a whole number of product packs.
Calculate076Everyday & specialist / mathematicsParallelogram Area
Find parallelogram area using a base and its perpendicular height.
Calculate077Everyday & specialist / mathematicsPercentage
Find what percentage a part represents of a whole.
Calculate078Everyday & specialist / sciencePendulum Period
Estimate the period of a simple pendulum for small swings.
Calculate079Everyday & specialist / mathematicsPercentage Change
Compare an original value and a new value to find relative change.
Calculate080Everyday & specialist / mathematicsPercentage Decrease
Apply a percentage decrease to an original value.
Calculate081Everyday & specialist / mathematicsPercentage Increase
Apply a percentage increase and find the new value.
Calculate082Everyday & specialist / mathematicsPercentage Error
Compare a measured value with a nonzero reference using absolute percentage error.
Calculate083Everyday & specialist / mathematicsPercentage of a Number
Find a percentage of any nonnegative number.
Calculate084Everyday & specialist / homePipe Water Volume
Estimate the internal water capacity of a straight circular pipe.
Calculate085Everyday & specialist / sciencepH from Hydrogen Ion Concentration
Estimate pH from hydrogen-ion concentration in a dilute ideal solution.
Calculate086Everyday & specialist / mathematicsPermutations
Count ordered selections without replacement from distinct items.
Calculate087Everyday & specialist / technologyPixel Density
Find display pixel density from resolution and physical diagonal.
Calculate088Everyday & specialist / homePool Fill Time
Estimate fill time from required volume and a measured constant flow rate.
Calculate089Everyday & specialist / scienceGravitational Potential Energy
Calculate gravitational potential-energy change in an approximately uniform field.
Calculate090Everyday & specialist / sciencePower
Calculate electrical power for DC or ideal resistive loads.
Calculate091Everyday & specialist / sciencePressure
Calculate average pressure from normal force over an area.
Calculate092Everyday & specialist / mathematicsBasic Probability
Find the probability of an event among equally likely outcomes.
Calculate093Everyday & specialist / businessProfit Margin
Calculate gross margin from revenue and the specified cost.
Calculate094Everyday & specialist / mathematicsPythagorean Theorem
Find the hypotenuse of a right triangle from its two perpendicular sides.
Calculate095Everyday & specialist / mathematicsPyramid Volume
Find pyramid volume from its base area and perpendicular height.
Calculate096Everyday & specialist / fitnessRace Time
Estimate finish time at a constant average pace.
Calculate097Everyday & specialist / mathematicsQuadratic Equation
Solve a quadratic equation for its real roots.
Calculate098Everyday & specialist / mathematicsRatio Scaling
Find an equivalent ratio when the first term is changed.
Calculate099Everyday & specialist / everyday lifeRecipe Scaling
Scale an ingredient quantity proportionally to a target serving count.
Calculate100Everyday & specialist / engineeringRC Time Constant
Find the time constant of a basic resistor-capacitor circuit.
Calculate101Everyday & specialist / financeRecurring Savings
Estimate savings growth with equal end-of-month deposits and monthly compounding.
Calculate102Everyday & specialist / mathematicsRectangle Perimeter
Find the total boundary length of a rectangle.
Calculate103Everyday & specialist / mathematicsRegular Polygon Area
Find the area of a regular polygon with equal sides and angles.
Calculate104Everyday & specialist / mathematicsReverse Percentage
Recover an original value after a known percentage increase.
Calculate105Everyday & specialist / homeRoof Pitch
Find roof pitch angle from rise and horizontal run in matching units.
Calculate106Everyday & specialist / homeRoom Area
Calculate a rectangular room’s floor area in square meters.
Calculate107Everyday & specialist / financeRule of 72
Estimate a doubling time using the Rule of 72 approximation.
Calculate108Everyday & specialist / businessSalary to Hourly
Convert annual gross salary into an equivalent hourly rate.
Calculate109Everyday & specialist / businessSales Tax
Apply an entered percentage tax rate to a before-tax price.
Calculate110Everyday & specialist / financeSavings Goal
Find the monthly contribution needed to reach a fixed savings goal without assumed returns.
Calculate111Everyday & specialist / mathematicsCircle Sector Area
Find the area of a circular sector from radius and central angle.
Calculate112Everyday & specialist / scienceSensible Heat
Estimate heat transferred during a temperature change without a phase change.
Calculate113Everyday & specialist / engineeringSeries Resistance
Find equivalent resistance for three resistors in series.
Calculate114Everyday & specialist / financeSimple Interest
Estimate interest when interest is calculated only on the original principal.
Calculate115Everyday & specialist / mathematicsSlope
Find the slope of the line through two coordinate points.
Calculate116Everyday & specialist / scienceSpeed
Find average speed from distance and elapsed time.
Calculate117Everyday & specialist / scienceSolution Mass Percent
Calculate a solute’s percentage of total solution mass.
Calculate118Everyday & specialist / mathematicsSphere Surface Area
Calculate the curved surface area of a sphere from its radius.
Calculate119Everyday & specialist / scienceSpring Energy
Calculate elastic potential energy stored in an ideal linear spring.
Calculate120Everyday & specialist / mathematicsSpherical Cap Volume
Find the volume of a spherical cap from sphere radius and cap height.
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