Grazing carrying capacity in animal unit months from acres, forage yield, use percent and days, with an optional herd check.

Bitcoin issued supply, block subsidy, percent of 21 million mined and the next halving, computed exactly from protocol rules.

Gallons of paint for a room from its size, doors, windows and coats; optional ceiling. Rounds up to the quart.

Posts, rails and pickets for a straight fence from its length, post spacing, picket width and gap.

Drywall sheets for a room's walls and ceiling (4x8, 4x10 or 4x12), with waste, screw count and approximate weight.

Concrete for a slab: cubic yards with waste, ready-mix order size and the number of 40, 60 or 80 lb bags of mix.

Decking boards, joist count and screws for a rectangular deck from its size, board width, gap, joist spacing and stock length.

Cubic yards and approximate tons of gravel, sand, topsoil, mulch or compost to cover an area at a given depth.

Board feet for lumber from thickness, width, length and quantity (nominal sizes), with total cost at a price per board foot.

Status of a Bitcoin transaction: unconfirmed or confirmed, confirmation depth, fee and fee rate, size and replaceability.

Bitcoin fee rates for next-block to economy confirmation, mempool congestion level and the cost of a typical transaction.

Bitcoin price in USD, EUR, GBP, CAD, CHF, AUD and JPY, with optional conversion of an amount of BTC, sats or fiat.

Convert roof pitch (rise per 12), angle or percent slope; get the rafter length multiplier and roof area factor.

Towing check in pounds: payload left after people, cargo and tongue weight, tow rating and combined weight limits.

Bitcoin network health: tip height, block pace vs 10 minutes, difficulty retarget forecast, hashrate trend and Lightning size.

Validate a Bitcoin mainnet address and report its type, confirmed and pending balance, transaction count and USD value.

Mining pool share of recent Bitcoin blocks with concentration (top-3 share, HHI) and the 51 percent check.

Validate a Bitcoin address checksum offline: base58check or bech32/bech32m, with type and network (mainnet or test).

Shannon entropy in bits per symbol from a frequency table, plus min-entropy, collision entropy and efficiency.

gcd, lcm and extended-Euclid Bezout coefficients of two integers, plus gcd/lcm of up to 20 more.