CConstructionVerified
Absolute-volume mix design yield
Convert a set of batch masses into the volume of concrete they actually produce, and the cement content per cubic metre that specifications are written against.
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165published calculators
3live specialist domains
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46 calculators
Construction
Concrete, roofs, stairs, framing, drywall, finishes, tile, plaster, render, and screed.
ACI 211.1Aggregate moisture statesASTM C138Roof framing
61 calculators
Finance
Loans, savings, rates, deposits, bonds, affordability, refinancing, and debt strategy.
Time value of moneyAmortisationAccumulationGoal funding
58 calculators
Energy
Solar, batteries, household costs, heating, backup, efficiency, and compressor performance.
Ratios & stagingHead & powerSizingYield & performance
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FFinanceVerified
TVM payment (loan or annuity instalment)
Find the level periodic payment that reconciles a present value, a periodic rate, a period count and a target ending balance, including payment timing.
EEnergyVerified
Compression ratio
Divide discharge pressure by suction pressure, both absolute, to get the dimensionless ratio that governs stage count, discharge temperature and shaft power.
CConstructionVerified
Aggregate free moisture and absorption adjustment
Separate the water an aggregate carries on its surface from the water it holds inside, so mix water can be corrected for what the stockpile delivers.
FFinanceVerified
Level loan payment from principal, rate and term
Work out the level instalment on a mortgage or amortising loan from the principal, the annual rate, the term in years and payments per year.
EEnergyVerified
Stages required
The smallest whole number of compression stages that reaches an overall ratio without exceeding a per-stage limit, resolved to avoid a spurious extra stage.
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Energy · Bank sizing
Usable capacity from depth of discharge
Complete directory
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165 calculators
Construction46 published calculators
C Absolute-volume mix design yield
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C Aggregate free moisture and absorption adjustment
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C Batch masses from a nominal volumetric mix ratio
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C Cement-bag mix yield check
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C Fresh concrete unit weight
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C Roof pitch conversion
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C Gable roof layout
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C Roof sheathing take-off
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C Shingle bundle take-off
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C L-shaped stair layout
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C Stair stringer cut length
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C Accessible ramp layout
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C Baluster count for a railing run
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C Wall framing take-off
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C Drywall sheet take-off
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C Paint quantity estimate
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C Flooring box take-off
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C Tile layout waste model
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C Tile adhesive quantity
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C Tile grout quantity
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C Skirting and trim take-off
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C Plaster multi-coat system volume
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C Plaster cement and sand from mix ratio
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C Render and skim coverage
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C Screed volume and materials
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C Deck material take-off
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C Fence material take-off
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C Pier footing concrete
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C Shed roof layout
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C Rafter count
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C Paver patio take-off
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C Driveway material volume
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C Mulch coverage
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C Lawn material coverage
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C Concrete slab take-off
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C Ready-mix concrete bags for a slab or footing
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C Concrete stairs volume
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C Masonry units with openings deducted
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C Mortar cement and sand from mix ratio
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C Stair layout with IRC reference check
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C Stair materials take-off
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C Board feet for lumber
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C Trim length and stock pieces
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C Insulation batts and packs for an area
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C Room air-conditioner sizing (rule of thumb)
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C Wallpaper rolls for a wall
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Finance61 published calculators
F TVM payment (loan or annuity instalment)
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F Level loan payment from principal, rate and term
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F Compound growth with monthly contributions
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F Required monthly deposit to reach a savings goal
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F Inflation erosion of buying power
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F Real rate of return
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F Annual percentage yield from a nominal rate
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F Continuous compounding future value
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F Holding-period yield, annualised
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F Deposit-insurance allocation check
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F Outstanding loan balance part-way through the term
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F How long a debt lasts at a chosen payment
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F What an extra payment buys in time and interest
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F The total interest a loan costs over its term
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F Maximum affordable housing payment from income
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F Stress-tested qualifying payment against income
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F Monthly private mortgage insurance payment
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F Months until the balance reaches a loan-to-value threshold
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F Current home equity and loan-to-value
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F Home-equity growth timeline
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F HELOC available credit from a combined loan-to-value limit
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F HELOC interest-only payment during the draw period
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F HELOC draw-to-amortizing payment after the draw period ends
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F Total buyer closing costs, and what share of the loan they are
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F The cash a buyer must bring to the closing table
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F What a sale actually leaves the seller
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F Rent or buy, compared as wealth at a chosen horizon
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F The fully-indexed ARM rate, rounded as the note requires
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F The instalment after an ARM adjustment, once the caps have had their say
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F The worst-case ARM instalment at the lifetime limit
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F The gap between an introductory instalment and a fully-indexed one
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F Certificate of deposit maturity value
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F Level-coupon bond price from yield to maturity
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F Macaulay duration of a level-coupon bond
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F Modified duration from Macaulay duration
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F Compare two loans by payment, interest and total cost
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F Monthly budget surplus and cash-flow runway
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F Retirement drawdown longevity under a growing withdrawal
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F Currency conversion with a fee, at your quoted rate
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F Margin versus markup from cost and selling price
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F Break-even units from fixed costs, price and variable cost
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F Investment return: total, annualized, net and real
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F Future value of a present amount and periodic payment
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F Present value of promised payments and a future amount
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F Future value of a recurring deposit stream
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F Required recurring deposit for a target fund
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F Flat or add-on rate as an approximate effective APR
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F Lease payment and APR-equivalent from a money factor
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F Affordable new payment from a DTI cap
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F Debt-to-income ratio check
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F Loan-to-value ratio and maximum loan from an LTV cap
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F Stress-tested payment at a rate shock
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F Credit utilization ratio and paydown to target
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F Refinance break-even in months
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F Discount points versus rate break-even
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F Balance-transfer net saving over the promo window
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F Debt consolidation comparison by weighted-average rate
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F Biweekly versus monthly payments: interest saved and term cut
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F Auto total cost of ownership, beyond sticker and payment
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F Months to clear a balance on a fixed minimum payment
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F Early-settlement interest rebate under the Rule of 78s
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Energy58 published calculators
E Compression ratio
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E Stages required
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E Adiabatic discharge temperature
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E Adiabatic head
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E PV array size from daily load
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E Annual PV yield estimate
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E Performance ratio from measured yield
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E Simple payback period
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E Battery bank size from load and autonomy
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E Usable capacity from depth of discharge
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E Battery runtime under a constant load
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E Storage cost per kWh cycled
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E Electricity bill with fixed charge and tax
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E Appliance running cost
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E Standby (vampire) power annual cost
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E EV home charging cost
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E Heat pump annual heating cost
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E Gas furnace annual heating cost
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E Heat pump versus gas furnace: the annual saving
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E Smart-thermostat setback saving
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E Backup energy required for an outage
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E Inverter continuous rating from load and margin
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E Inverter surge rating from motor starts
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E Solar recharge time for an energy deficit
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E Panel count from a target array size
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E Roof-area feasibility check
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E Affordable array size from a budget
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E Installed cost per watt
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E Compare two solar quotes
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E Daily PV yield estimate
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E Carbon dioxide emissions avoided
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E Air conditioner running cost
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E Electricity bill from units consumed
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E Refrigerator annual running cost
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E Electric heater running cost
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E EV running cost per kilometre
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E Grid, solar or generator: cost per kilowatt-hour compared
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E Whole-house envelope UA roll-up
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E Insulation R-value upgrade: the UA reduction
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E Insulation upgrade: the annual saving
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E Insulation upgrade simple payback
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E Air-sealing: the annual saving
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E Air-sealing simple payback
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E Window U-value upgrade: the UA reduction
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E Window upgrade: the annual saving
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E Window upgrade simple payback
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E Whole-home LED conversion annual saving
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E LED conversion simple payback
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E Efficient-appliance annual saving
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E Efficient-appliance price-premium payback
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E Retrofit simple payback
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E Electric-resistance water heater annual cost
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E Heat-pump water heater annual cost
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E Heat pump versus electric water heater: the annual saving
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E Annual heating cost by the degree-day method
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E Electric-resistance annual heating cost
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E Heat pump versus resistance: the annual saving
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E Solar-ready roof pre-check
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