🧮 Calculator & Guide

Diwali Lights & Diya Calculator

Set your exterior perimeter or balcony length, decorated rooms, and illumination style to determine exact clay diyas, liters of oil, cotton wicks, and fairy light strings.

👨‍🍳
Tested & written by Tarun Batta
Crowd-TestedUpdated October 2026
festivals
Diwali Lights & Diya Calculator
60 ft
3 rooms
2 — Festive Celebration

Total Clay Diyas Needed

54

diyas (24 outdoor · 30 indoor)

Mustard Oil / Ghee

1.5 L (~6 cups)

Cotton Wicks (Baati)

68 wicks

String Light Footage

72 linear ft

33-ft Fairy Light Strings

3 strings

Outdoor Border Diyas

24

Matchboxes / Lighters

2 boxes

💡 Pro Tips

  • • Soak new clay diyas in clean water overnight before lighting to prevent them from soaking up all your oil.
  • • Pour mustard oil or sesame oil for long-burning outdoor diyas; use fragrant desi ghee for mandir diyas.
  • • Place outdoor diyas inside glass votives or hurricane lanterns if your balcony is breezy.
  • • Check outdoor outdoor-rated GFCI extension cords before stringing fairy lights along railings.

The Host-Tested Guarantee

Built on real crowd portioning data and event planner benchmarks. Formulas tested for accurate catering without shortages.

How Many Diyas and String Lights Do You Need for Diwali?

Quick-reference portion benchmarks and host-tested formulas for planning your gathering.

Outdoor SpacingEvery 2.5 feet along balcony / porch railing
Indoor Diyas8 to 12 diyas per decorated room / mandir
Oil Consumption~25ml mustard oil or ghee per diya (3-4 hrs)
Cotton Wicks1 per diya + 25% spare

💡 Host Portion Rules of Thumb

  • •60 ft balcony + 3 rooms: plan on 50 to 55 clay diyas and 1.5 liters of oil.
  • •120 ft perimeter: plan on 100 to 120 diyas and 3 to 3.5 liters of oil.
  • •Soak unglazed clay diyas in water overnight so they don't absorb your oil.

Diwali Lights & Diya Calculator Frequently Asked Questions

How many clay diyas do I need for Diwali?

For a standard 60-foot balcony or porch perimeter and 3 indoor rooms, plan on 50 to 55 diyas (about 24 spaced every 2.5 feet outside and 10 per indoor room/mandir).

How much oil does a clay diya use?

A standard small terracotta diya holds roughly 25ml of oil or ghee and burns for 3 to 4 hours. Plan for 1.5 liters of mustard or sesame oil for 50 diyas.

Why should you soak clay diyas in water before Diwali?

Dry unglazed terracotta is porous and drinks up oil. Soaking new diyas in clean water overnight saturates the clay pores so your oil burns slowly instead of being absorbed.

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