Paper Weight (GSM ↔ US Basis)Paper & Printing
Convert between Grams per Square Meter (GSM) and US basis weights (Bond, Cover, Text, Index) to match printing stocks.
US basis weight measures 500 sheets cut to a particular stock category size (e.g. 17"x22" for Bond). GSM measures a consistent, single square meter irrespective of stock type, which makes standard comparison much simpler.
Brochures, catalog pages, flyers, resumes. Offers rich color graphics without bleed-through.
Weight Scale Gauge
Average thickness assuming standard uncoated fiber compression ratios.
Weight for a standard package ream containing 500 sheets of A4 paper.
Explore Additional Utilities
Ballistic Mils ↔ Angles
Convert between ballistics mils (NATO, Warsaw, Swedish), degrees, and MOA, with range estimation calculators.
Fragrance concentration — EDC ↔ EDT ↔ EDP ↔ parfum %
Calculate fragrance oil and diluent volumes/weights for Eau de Cologne, Toilette, Parfum, and Extrait profiles.
Displacement tonnage ↔ cubic meters — ship buoyancy
Convert ship displacement tonnage to submerged volume (m³) and buoyancy force. Choose between freshwater and saltwater standards.
Sight mark ↔ distance — graduated sight tape
Generate calibrated sight marks and construct sight tape lines for varying shooting distances based on core velocity.
Bra Size Converter
Convert bra band and cup sizes across US, UK, EU, and French sizing standards with precise measurements.
Scale factor (model size ↔ real world)
Convert dimensions between model design sizes and physical real-world scale targets, including imperial/metric conversions.
Soil Plasticity Index Calculator
Calculate Plasticity Index (PI) from Liquid Limit (LL) and Plastic Limit (PL), and interpret soil state using the Atterberg limits chart.
USCS Soil Classification Solver
Classify soil type under the Unified Soil Classification System (USCS) using sieve analysis and Atterberg limits.
Infill density (% ↔ structural strength)
Estimate mechanical tensile strength and relative part weight based on infill percentage, material choice, and shell count.
Conveyor speed (belt speed ↔ parts per minute)
Calculate conveyor belt linear velocity from pulley diameter and RPM, and estimate throughput in parts per minute based on spacing.
Coal consumption — forge size ↔ hours ↔ kg of fuel
Forecast required metallurgical coal or coke fuel weight for active forge sessions.
Soil Permeability Converter
Convert coefficient of permeability (hydraulic conductivity) between cm/s, m/day, ft/day, and m/s with soil type drainage classifications.
Carat weight ↔ grams
Convert between diamond or gemstone carats, metric grams, grains, and points of gem weight.
Filament weight ↔ length (grams ↔ meters)
Convert between filament physical weight in grams and equivalent spool length in meters based on material density and diameter.
Propolis yield — colony strength ↔ grams per season
Estimate seasonal propolis yields based on colony strength, regional resin availability, and propolis trap usage.
Gear ratio (input RPM ↔ output RPM ↔ torque)
Calculate gear ratios and convert input RPM and torque to output values based on compound single or double-stage tooth configurations.
Prism Power Converter
Convert ophthalmic prism power between prism diopters (PD) and degrees of deviation, with light bending estimations.
Pulp consistency — dry fiber % ↔ water ratio
Calculate dry fiber weight percentage in wet pulp slurry and water mixing dilution ratios for vat dipping.
Board size — rider weight ↔ wind conditions → liters
Calculate optimal board size, volume, and dimensions for your riding style.
Formation — fiber length ↔ sheet uniformity estimate
Analyze pulp fiber lengths and slurry consistency to estimate flocculation risk and sheet formation uniformity.