Convert millions & billions to lakhs & crores — instantly.

1 million equals 10 lakh. A lakh is 1,00,000 (10⁵) and a million is 1,000,000 (10⁶), so multiply millions by ten — 4.5 million is 45 lakh.

Divide the number of millions by 10. One crore equals 10 million (1,00,00,000), so 250 million is 25 crore, and 4,500 million (4.5 billion) is 450 crore.

1 billion equals 100 crore (1,00,00,00,000). In the classical South Asian scale this is also called 1 arab. For example, 3.2 billion is 320 crore.

A lakh crore is 1,00,000 × 1,00,00,000 = 10¹², which is exactly 1 trillion. Indian newspapers use it for budgets and GDP: ₹2 lakh crore means ₹2 trillion.

After crore (10⁷) come arab (10⁹), kharab (10¹¹), neel (10¹³), padma (10¹⁵) and shankh (10¹⁷). Each unit is one hundred times the one before it.

In Pakistan and in Urdu, arab and kharab are everyday units. Indian English and Hindi media mostly stop at crore and express larger amounts as “lakh crore” instead.

Indian grouping places a comma after the first three digits from the right, then after every two: 45,00,000. The pattern mirrors the units themselves — thousand takes three digits, and every unit after it (lakh, crore, arab…) adds two.

Up to 60 digits, converted exactly. It uses arbitrary-precision integer arithmetic rather than floating point, so even values far beyond a shankh (10¹⁷) are never rounded or corrupted.