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National Income Calculator with Solved Class 12 Numericals

National Income numericals become difficult when students know each formula separately but are unsure which adjustment comes next. This toolkit now combines a formula map, original solved numericals and the most useful Class 12 GDP and National Income calculators so you can solve the question yourself and then verify every conversion step.

Formula map

  • Domestic → National: National Aggregate = Domestic Aggregate + NFIA — Add Net Factor Income from Abroad (NFIA).
  • Gross → Net: Net Aggregate = Gross Aggregate − Depreciation — Subtract consumption of fixed capital / depreciation.
  • Market Price → Factor Cost: Factor Cost = Market Price − Net Indirect Taxes — Net Indirect Taxes = Indirect Taxes − Subsidies.
  • National Income: NNPfc = GDPmp + NFIA − Depreciation − NIT — NNP at factor cost is National Income.
  • GDP Deflator: GDP Deflator = (Nominal GDP ÷ Real GDP) × 100 — Use the same monetary unit for nominal and real GDP.

25 solved numericals with steps

These are original learning problems prepared for practice and are not labelled as official CBSE previous-year questions.

Q1. GDP to NDP — Basic

GDP at market price is ₹1,500 crore and depreciation is ₹100 crore. Find NDP at market price.

  1. NDPmp = GDPmp − Depreciation
  2. = 1,500 − 100

Answer: ₹1,400 crore

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Q2. GDP to GNP — Basic

GDP at market price is ₹1,500 crore and NFIA is ₹20 crore. Find GNP at market price.

  1. GNPmp = GDPmp + NFIA
  2. = 1,500 + 20

Answer: ₹1,520 crore

Q3. GDP to National Income — Board-style

GDPmp = ₹1,500 crore, depreciation = ₹100 crore, NFIA = ₹20 crore and NIT = ₹80 crore. Find National Income.

  1. NNPfc = GDPmp + NFIA − Depreciation − NIT
  2. = 1,500 + 20 − 100 − 80

Answer: ₹1,340 crore

Q4. Net Indirect Taxes — Basic

Indirect taxes are ₹100 crore and subsidies are ₹20 crore. Find Net Indirect Taxes.

  1. NIT = Indirect Taxes − Subsidies
  2. = 100 − 20

Answer: ₹80 crore

Q5. NFIA — Basic

Factor income from abroad is ₹120 crore and factor income paid abroad is ₹90 crore. Find NFIA.

  1. NFIA = Factor Income from Abroad − Factor Income to Abroad
  2. = 120 − 90

Answer: ₹30 crore

Q6. Domestic Factor Income to National Income — Basic

NDP at factor cost is ₹900 crore and NFIA is ₹30 crore. Find National Income.

  1. NNPfc = NDPfc + NFIA
  2. = 900 + 30

Answer: ₹930 crore

Q7. GNPmp to NNPfc — Mixed conversion

GNP at market price is ₹1,600 crore, depreciation is ₹100 crore and NIT is ₹70 crore. Find National Income.

  1. NNPfc = GNPmp − Depreciation − NIT
  2. = 1,600 − 100 − 70

Answer: ₹1,430 crore

Q8. Negative NFIA — Mixed conversion

GDPmp = ₹1,800 crore, depreciation = ₹120 crore, NIT = ₹90 crore and NFIA = −₹20 crore. Find National Income.

  1. NNPfc = GDPmp + NFIA − Depreciation − NIT
  2. = 1,800 − 20 − 120 − 90

Answer: ₹1,570 crore

Q9. Find GDP from National Income — Reverse question

National Income is ₹1,200 crore, NFIA = ₹20 crore, depreciation = ₹100 crore and NIT = ₹80 crore. Find GDPmp.

  1. NNPfc = GDPmp + NFIA − Depreciation − NIT
  2. GDPmp = NNPfc − NFIA + Depreciation + NIT
  3. = 1,200 − 20 + 100 + 80

Answer: ₹1,360 crore

Q10. NDP to GDP — Reverse question

NDP at market price is ₹1,300 crore and depreciation is ₹100 crore. Find GDPmp.

  1. GDPmp = NDPmp + Depreciation
  2. = 1,300 + 100

Answer: ₹1,400 crore

Q11. NNPmp to GNPmp — Reverse question

NNP at market price is ₹1,450 crore and depreciation is ₹100 crore. Find GNPmp.

  1. GNPmp = NNPmp + Depreciation
  2. = 1,450 + 100

Answer: ₹1,550 crore

Q12. Factor Cost to Market Price — Conversion

NDP at factor cost is ₹1,100 crore and NIT is ₹70 crore. Find NDP at market price.

  1. NDPmp = NDPfc + NIT
  2. = 1,100 + 70

Answer: ₹1,170 crore

Q13. GDPmp to GDPfc — Conversion

GDP at market price is ₹2,000 crore and NIT is ₹120 crore. Find GDP at factor cost.

  1. GDPfc = GDPmp − NIT
  2. = 2,000 − 120

Answer: ₹1,880 crore

Q14. Value Added Method — Method

Gross value added at market price of primary, secondary and tertiary sectors is ₹300, ₹450 and ₹550 crore. Depreciation = ₹70 crore, NIT = ₹90 crore and NFIA = ₹10 crore. Find GDPmp and National Income.

  1. GDPmp = 300 + 450 + 550 = 1,300
  2. NNPfc = 1,300 − 70 − 90 + 10

Answer: GDPmp = ₹1,300 crore; National Income = ₹1,150 crore

Q15. Expenditure Method — Method

PFCE = ₹600 crore, GFCE = ₹200 crore, GDCF = ₹250 crore, exports = ₹100 crore and imports = ₹80 crore. Depreciation = ₹50 crore, NIT = ₹70 crore and NFIA = ₹10 crore. Find GDPmp and National Income.

  1. Net Exports = 100 − 80 = 20
  2. GDPmp = 600 + 200 + 250 + 20 = 1,070
  3. NNPfc = 1,070 − 50 − 70 + 10

Answer: GDPmp = ₹1,070 crore; National Income = ₹960 crore

Q16. Income Method — Method

Compensation of employees = ₹500 crore, rent = ₹80 crore, royalty = ₹20 crore, interest = ₹50 crore, profit = ₹150 crore and mixed income = ₹100 crore. NFIA = ₹20 crore. Find NDPfc and National Income.

  1. Operating Surplus = 80 + 20 + 50 + 150 = 300
  2. NDPfc = 500 + 300 + 100 = 900
  3. NNPfc = 900 + 20

Answer: NDPfc = ₹900 crore; National Income = ₹920 crore

Q17. GDP Deflator — Real vs nominal

Nominal GDP is ₹1,250 crore and Real GDP is ₹1,000 crore. Find GDP Deflator.

  1. GDP Deflator = (Nominal GDP ÷ Real GDP) × 100
  2. = (1,250 ÷ 1,000) × 100

Answer: 125

Q18. Find Real GDP — Real vs nominal

Nominal GDP is ₹1,500 crore and GDP Deflator is 120. Find Real GDP.

  1. Real GDP = (Nominal GDP ÷ GDP Deflator) × 100
  2. = (1,500 ÷ 120) × 100

Answer: ₹1,250 crore

Q19. Find Nominal GDP — Real vs nominal

Real GDP is ₹1,200 crore and GDP Deflator is 110. Find Nominal GDP.

  1. Nominal GDP = (Real GDP × GDP Deflator) ÷ 100
  2. = (1,200 × 110) ÷ 100

Answer: ₹1,320 crore

Q20. National from Domestic Income — NFIA

Domestic factor income is ₹1,000 crore. Factor income from abroad is ₹80 crore and factor income paid abroad is ₹100 crore. Find National Income.

  1. NFIA = 80 − 100 = −20
  2. National Income = Domestic Factor Income + NFIA
  3. = 1,000 − 20

Answer: ₹980 crore

Q21. Find Domestic Income — Reverse question

National Income is ₹1,000 crore and NFIA is −₹30 crore. Find NDP at factor cost.

  1. NNPfc = NDPfc + NFIA
  2. NDPfc = NNPfc − NFIA
  3. = 1,000 − (−30)

Answer: ₹1,030 crore

Q22. Four Adjustments — Mixed conversion

GDPmp = ₹1,700 crore, depreciation = ₹100 crore, NIT = ₹60 crore and NFIA = ₹40 crore. Find National Income.

  1. NNPfc = GDPmp + NFIA − Depreciation − NIT
  2. = 1,700 + 40 − 100 − 60

Answer: ₹1,580 crore

Q23. Given NDPfc — Reverse + concept

NDP at factor cost is ₹1,500 crore, depreciation = ₹100 crore, NIT = ₹80 crore and NFIA = ₹20 crore. Find GDPmp and National Income.

  1. GDPmp = NDPfc + Depreciation + NIT
  2. = 1,500 + 100 + 80 = 1,680
  3. NNPfc = NDPfc + NFIA = 1,500 + 20

Answer: GDPmp = ₹1,680 crore; National Income = ₹1,520 crore

Q24. Taxes, Subsidies and Negative NFIA — Mixed signs

GDPmp = ₹1,600 crore, indirect taxes = ₹110 crore, subsidies = ₹30 crore, depreciation = ₹90 crore, factor income from abroad = ₹60 crore and factor income paid abroad = ₹80 crore. Find National Income.

  1. NIT = 110 − 30 = 80
  2. NFIA = 60 − 80 = −20
  3. NNPfc = 1,600 − 90 − 80 − 20

Answer: ₹1,410 crore

Q25. Output minus Intermediate Consumption — Value added

Value of output is ₹2,000 crore and intermediate consumption is ₹800 crore. Depreciation = ₹100 crore, NIT = ₹60 crore and NFIA = ₹20 crore. Find GVAmp and National Income.

  1. GVAmp = Value of Output − Intermediate Consumption
  2. = 2,000 − 800 = 1,200
  3. NNPfc = 1,200 − 100 − 60 + 20

Answer: GVAmp = ₹1,200 crore; National Income = ₹1,060 crore

Quick self-test

  1. GDPmp ₹900, depreciation ₹50. Find NDPmp. Answer: ₹850
  2. NDPfc ₹700, NFIA ₹15. Find NNPfc. Answer: ₹715
  3. Indirect taxes ₹75, subsidies ₹25. Find NIT. Answer: ₹50
  4. GDPmp ₹1,000, NFIA −₹10, depreciation ₹60, NIT ₹40. Find NNPfc. Answer: ₹890
  5. NNPmp ₹800 and NIT ₹50. Find NNPfc. Answer: ₹750
  6. GDPmp ₹1,300 and NFIA ₹30. Find GNPmp. Answer: ₹1,330
  7. GNPmp ₹1,200 and depreciation ₹100. Find NNPmp. Answer: ₹1,100
  8. Nominal GDP ₹1,100 and Real GDP ₹1,000. Find GDP Deflator. Answer: 110
  9. Real GDP ₹900 and deflator 120. Find Nominal GDP. Answer: ₹1,080
  10. Factor income from abroad ₹40 and to abroad ₹55. Find NFIA. Answer: −₹15

Continue the topic

Topics covered

  • GDP, NDP, GNP and NNP
  • Domestic versus national aggregates
  • Gross versus net aggregates
  • Market price versus factor cost
  • NFIA and net indirect taxes
  • Real GDP, nominal GDP and GDP deflator
  • Income, expenditure and value-added methods
  • Reverse conversion questions
  • Negative NFIA and mixed-sign questions

Calculators in this toolkit

Frequently asked questions

Is there a free National Income calculator?

Yes. This page groups free step-by-step calculators for GDP, NDP, GNP, NNP, NFIA, depreciation, net indirect taxes, real GDP and the three National Income methods.

How do I convert GDP into National Income?

Start from the given aggregate, add NFIA to move from domestic to national, subtract depreciation to move from gross to net, and subtract net indirect taxes to move from market price to factor cost. The exact steps depend on the starting aggregate.

Which method is used to calculate National Income?

Class 12 Economics commonly studies the income method, expenditure method and value-added or product method. Separate calculators and worked examples are provided for all three.

Are these solved numericals copied from board papers?

No. The worked numericals on this page are original learning problems unless a source is explicitly identified. They are designed to practise the same formula relationships without pretending to be official board questions.

Are these calculators free?

Yes. Every calculator in this toolkit is free and shows the formula and working, not only the final number.

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CLASS 12 ECONOMICS · NATIONAL INCOME

National Income calculator: use the free tools on this page for GDP, NDP, GNP/GNI and NNP, then use the conversion ladder below to understand every adjustment.

National Income calculator: the conversion ladder

Most National Income numericals become easier when you separate the three adjustments: gross/net, domestic/national and market price/factor cost.

1. Gross to Net

Net = Gross − Depreciation

  • NDP = GDP − Depreciation
  • NNP = GNP − Depreciation

2. Domestic to National

National = Domestic + NFIA

  • GNP/GNI = GDP + Net Factor Income from Abroad (NFIA)
  • NNP = NDP + NFIA

NFIA in one line

NFIA = factor income received from abroad − factor income paid abroad. For example, if residents receive ₹30 crore from abroad and non-residents earn ₹45 crore here, NFIA = 30 − 45 = −₹15 crore. Add that negative value when converting domestic income to national income.

Try the NFIA calculator and check the sign →

3. Factor Cost and Market Price

Market Price = Factor Cost + Net Indirect Tax

Factor Cost = Market Price − Net Indirect Tax

And remember: Net Indirect Tax = Indirect Taxes − Subsidies.

One worked example

Suppose GDP at market price = ₹1,000 crore, depreciation = ₹100 crore, NFIA = ₹20 crore and NIT = ₹80 crore.

  1. NDP at market price = 1,000 − 100 = ₹900 crore.
  2. NNP at market price = 900 + 20 = ₹920 crore.
  3. NNP at factor cost = 920 − 80 = ₹840 crore.

The sign rule students forget

  • Gross → Net: subtract depreciation.
  • Domestic → National: add NFIA.
  • Factor Cost → Market Price: add NIT.
  • Market Price → Factor Cost: subtract NIT.

Quick self-check

  • GDP = 500 and depreciation = 50. What is NDP?
  • NDP = 450 and NFIA = −10. What is NNP?
  • NNP at market price = 600 and NIT = 40. What is NNP at factor cost?

Self-check answers: ₹450; ₹440; ₹560 respectively.

Need help with NIT? Open the Net Indirect Tax calculator → · Class 12 Economics revision guide → · Commerce coaching in Mehsana →