HariTools · Made for Sri Lanka
Free tools, calculators and learning maps for Sri Lanka
Calculate tax, bills and grades, find local codes, or explore Sri Lanka’s rivers. Free to use, with sources and limitations explained where they matter.
- Free to use
- No signup needed
- Calculator inputs stay in your browser
- Visits · across the site
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Featured tools
Choose a tool and get straight to the task.
Income Tax (APIT) Calculator
Estimate monthly APIT, employee EPF, and take-home salary.Electricity Bill (PUCSL)
Estimate a 30-day CEB/LECO domestic bill using the May 2026 tariff schedule.Loan / EMI Calculator
Work out monthly instalments and total interest on a loan in LKR.NIC Decoder
Read the date of birth, age, and gender out of a Sri Lankan NIC, and convert between the old and new formats.Sri Lanka Postal Code Finder
Find postal codes by city, town or post office in English, Sinhala or Tamil.A/L Z-Score
Explore how subject marks, grades and statistics affect an estimated A/L Z-score.
What’s new
New resources and useful improvements across HariTools.
- New
Explore Sri Lanka’s provinces and districts
Explore all 9 provinces and 25 districts, connect each district to its province and try activities for learners and classrooms.
- New
Explore Sri Lanka’s lakes, reservoirs and tanks
Find 200 selected water bodies, compare their mapped shapes and try activities for curious learners and classrooms.
- New
Explore Sri Lanka’s rivers
Follow 45 rivers and tributaries, compare their names and try geography activities for learners and classrooms.
HariTools Learn
Learn by exploring
Interactive maps and activities for curious learners, students and teachers.
Explore the Sri Lanka rivers map →
Follow 45 rivers and tributaries, compare their names and try a geography activity.
Browse by topic
Find more calculators and lookups for what you need to do.
Money & tax
All tools in this topicStudy & exams
All tools in this topicLocal lookups & everyday tools
All tools in this topicBusiness & work
All tools in this topicHealth & dates
All tools in this topicSri Lanka guides and explainers
Understand the methods and decisions behind the tools.
Updated
GPA Class Ranges in Sri Lanka: University Examples
Compare Sri Lankan university degree-class examples, see why GPA thresholds vary by programme and intake, and plan the credits needed for a target CGPA.
Target GPA Estimator →Updated
A/L Z-Score and University Cut-Offs in Sri Lanka Explained
What the A/L Z-score measures, why raw marks cannot be compared across subjects, how district quotas work, and how to read last year's cut-off marks.
A/L Z-Score →Published
TIN Sri Lanka 2026: How to Get Your Taxpayer Number
Learn who needs a Sri Lankan TIN, how to register online, required documents, and which transactions need a TIN certificate from 1 November 2026.
Income Tax (APIT) Calculator →
How HariTools is maintained
Where rules or datasets matter, tool pages explain sources, review dates, assumptions and limitations. Some results are estimates; check the page notes before relying on them.
Before you start
Do I need an account or payment?
No. HariTools calculators, lookups and learning playgrounds are free to use without signing up.
Which languages are available?
The full collection is available in English, with selected tools and guides in Sinhala. Some lookup datasets also support Sinhala and Tamil names; this does not mean every interface is translated.
How can I check a result?
Read the tool’s method, source notes and limitations. For regulated calculations, check the applicable effective date. Estimates and historical university cut-offs do not replace official results or decisions.