Lime Requirement Calculator
Estimate how much agricultural lime to apply to raise an acidic soil's pH to the target, based on soil pH, texture and field area.
Common CCE values: pure calcite 100%, agricultural lime 80–95%, dolomite ~95–108% (also adds Mg), basic slag 60–70%. Apply 2–3 months before sowing and incorporate; split doses above 5 t/ha across two seasons.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Farmers and agronomists rely on the free Lime Requirement Calculator for accurate, instant results in the field — no spreadsheet, no sign-up, and it works offline.
About Lime Requirement Calculator
Acidic soils lock up phosphorus and stunt most crops; liming raises pH and frees those nutrients. This calculator estimates the agricultural lime needed from your current pH, target pH and soil texture (heavier clays need more lime than sandy soils), then scales it to your field — distinct from gypsum, which supplies sulphur/calcium without changing pH.
How to use Lime Requirement Calculator
- 1Enter your field details and any soil-test values you have.
- 2Read the recommendation, converted into practical quantities.
- 3Follow the timing/application guidance shown with the result.
Why use Lime Requirement Calculator?
- ✓Based on standard ICAR / soil-science recommendations
- ✓Adjustable to your own soil test and field size
- ✓Results in real products and bags you can take to the dealer
- ✓Free, instant and fully in-browser
Frequently asked questions
How much lime do I need to raise soil pH?+
It depends on how far below target your pH is and how buffered the soil is — clay soils need far more lime than sandy soils for the same pH rise. The calculator estimates this from your pH gap and texture; a buffer-pH lab test refines it further.
Lime or gypsum — which should I use?+
Lime raises pH and corrects acidity; gypsum supplies calcium and sulphur without changing pH and is used for sodic-soil reclamation or sulphur nutrition. Use lime for acidic soils, gypsum for sodicity or sulphur — they are not interchangeable.
Is this tool free and private?+
Yes — completely free with no sign-up, and every calculation runs in your browser, so it works offline and your data never leaves the device.
Related Agri tools
Tractor Fuel Consumption Calculator
Estimate your tractor's diesel consumption per hour from its horsepower, load and specific fuel consumption.
● LiveTractor Fuel Cost Per Acre Calculator
Convert your tractor's fuel use per hour into diesel litres and cost per acre for any field operation.
● LiveImplement Field Capacity Calculator
Calculate the effective field capacity (ha/h and acres/h) of any implement from width, speed and field efficiency.
● Live