Local & global work
For your desk, your shop and your field. Work stays in your browser tab.
Sri Lanka income tax estimator
Estimate annual progressive income tax using your verified brackets.
Sri Lanka monthly tax estimator
Annualize monthly income and estimate an average monthly tax.
Sri Lanka EPF estimator
Calculate employee and employer contributions from supplied rates.
Sri Lanka ETF estimator
Estimate employer ETF contribution using a supplied rate.
Sri Lanka NIC format checker
Check old or new NIC structure and inspect the encoded date.
Old NIC to new format
Show an approximate 12-digit structural mapping of an old NIC.
NIC encoded birth date
Decode the year and encoded day in an old or new NIC.
LKR currency converter
Convert LKR using a rate you supply.
Custom currency converter
Convert any amount using a user-entered directional rate.
VAT amount estimator
Calculate tax and gross price from a supplied VAT rate.
Work hours calculator
Calculate shift duration less unpaid break time.
Overtime pay estimator
Calculate overtime pay using your agreed multiplier.
Freelance hourly rate
Estimate a billable hourly rate for an annual revenue target.
Invoice text generator
Create a plain-text invoice from item and price pairs.
Inventory reorder point
Estimate a reorder point from daily demand, lead time and safety stock.
Stock turnover calculator
Calculate inventory turnover and approximate days on hand.
Unit price comparison
Compare two packs using the same quantity units.
Cash denomination counter
Total counts of Sri Lanka cash denominations.
Land perch converter
Convert a land area in perches into acres and square metres.
Seed requirement calculator
Estimate seed needed from area and a supplied sowing rate.
Plant spacing calculator
Estimate plant count from area and rectangular spacing.
Fertilizer quantity calculator
Calculate total fertilizer mass from a supplied application rate.
Irrigation volume calculator
Estimate water volume from area and application depth.
Crop yield estimator
Estimate harvested mass from area and a supplied yield.
Harvest revenue estimator
Estimate gross revenue before production and selling costs.
Rainwater harvest calculator
Estimate collected rainwater from roof area, rainfall and runoff factor.
Electricity cost estimator
Estimate energy use with a flat rate supplied by you.
Water usage estimator
Estimate water consumption from flow and use time.
Business days calculator
Count weekdays between dates, excluding supplied holidays.
International phone formatter
Normalize a phone number with a supplied country calling code.