Calculate groundwater withdrawal using analytical formulas
Calculate groundwater pumping schemes for isolated confined or unconfined aquifers. Use analytical formulas from works by Bokhaver, Shestakov, Mironenko, and Sindicovskiy. Input parameters to determine flow rates and drawdown values.
by Valentin Vasilev★ 0.00 ratingsUtilities$0.99Data updated 2026-09-06
Calculate proportions using direct and inverse methods. Input known values to find unknowns in equations like "If X Foo equals Y bla, then Z Foo equals [?] bla". Solve for price, quantity, or other proportional relationships.
Calculate , suspension cable, and civil parameters with 58 specialized tools. Input values and units to get automatic results. Switch between metric and imperial units.
Calculate pay and total earnings by adding regular and hours. Input hourly rates and hours worked. Display total pay and break down regular and amounts. Save and export results.
Calculate total length, emitters, flow, and application rate for each zone. Recommend products and accessories based on plant type, soil, and project size. Input project details to generate accurate irrigation specifications.
Customize calculation steps for taxes, discounts, shipping, and exchange rates. Create multiple templates for different products and regions. Generate various prices including wholesale, VIP, and retail rates simultaneously.
Calculate gas size based on BTU load, length, and gas type (LP or Natural). Input values and select gas type to determine minimum size. Output result for immediate use.
Estimate construction material quantities for building and paving projects. Input job parameters like length, width, and thickness. Select material properties such as density from predefined options.
Simulates a retro scientific calculator with RPN input. Features a 10-digit LED display, four stack registers, and a storage register. Includes math, trigonometric, and logarithmic functions. Displays results in polar/rectangular formats.
Calculate resistance for series or parallel combinations. Determine pairs to achieve a target resistance. Compute R1/R2 ratios and voltage divider values. Calculate values for inverting amplifier gain. Save results as CSV files.
Calculate requirements for granular and liquid types using various unit measurements. Input soil test results and desired nutrient levels. pplication rates for lawns, gardens, and crops. Export results for record-keeping.
Calculate requirements for concrete slabs by entering dimensions, spacing, and edge distances. Determine layout and quantities needed. Switch between imperial and metric units. Export results via text or email.
Pay municipal and state fees for services like passport issuance, driver's license replacement, property registration, and EGRN extracts. Make payments via the for fines, taxes, and debts.
Calculate ratios, torque, and speed for train systems. Input teeth numbers and speeds to determine outputs. Simulate train operation instantly. Preview system functionality before 3D printing.
Calculate car gear ratios using spur and pinion gear counts and secondary gear ratios. Input values to determine final drive ratio. Compare low and high gear settings for acceleration, speed, motor load, and battery life.
Calculate sizes and compare rim compatibility. Input measurements to determine proper fit. Display results in a today widget for quick reference. Track step-by-step calculations for accuracy.
Calculate force, distance, and mechanical advantage
Calculate mechanical advantage and forces in with instant results. Input distance and force values to determine effort or load. Copy results to other apps. Includes formulas and supports multiple units and decimal precision.