Grocery Budget Calculator
Plan a monthly grocery budget from household size, diet and eating-out habits.
Formula and sources updated · Data sources · 1View algorithm, constants and default inputs (JSON)
About this calculator
A customizable US-dollar planning model, not a current local price survey or an official USDA estimate. Adult monthly food baselines are $230/$275/$340/$430; children are modeled at 70% of the adult base. Diet factors and the assumed 60% eating-out savings are rough model assumptions, not nutrition guidance or guaranteed savings. Adjust every input to your household and location.
Worked example
calculated with the default values below
Adults in the household 2 · Children in the household 2 · Spending level Moderate · Diet Omnivore · Meals eaten out per week 3 · Cost per meal out 18 $ · Coffee and snacks per week 25 $ Adult food cost 680 $/month · Child food cost 476 $/month · Groceries per month 1,156 $ · Eating out per month 235 $ · Total food spending per month 1,499 $ · Cost per person 375 $ · Saving if meals out were cooked at home 141 $
Method and assumptions
T = b×d×(A + 0.7C) + 4.345×(u + k) b lookup: thrifty 230, low-cost 275, moderate 340, liberal 430; d: omnivore 1.00, vegetarian 0.92, vegan 0.95, keto 1.25. Children count 70%; 4.345 converts weekly spend to monthly. A customizable US-dollar planning model, not a current local price survey or an official USDA estimate. Adult monthly food baselines are $230/$275/$340/$430; children are modeled at 70% of the adult base. Diet factors and the assumed 60% eating-out savings are rough model assumptions, not nutrition guidance or guaranteed savings. Adjust every input to your household and location. Use the cited guidance and your own measurements, bills or product specifications to choose inputs. Sample defaults are not current local data.
Data sources
Use the cited guidance and your own measurements, bills or product specifications to choose inputs. Sample defaults are not current local data.
Disclaimer
These calculators give general estimates. Sizing, pricing, availability and standards vary by brand, retailer and country, so treat the output as a starting point and confirm it against the seller's or authority's own figures.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
T = b×d×(A + 0.7C) + 4.345×(u + k)
- b
- Monthly food cost per adult, $
- d
- Diet adjustment factor
- A
- Number of adults
- C
- Number of children
- u
- Weekly restaurant spend, $
- k
- Weekly coffee and snacks spend, $
b lookup: thrifty 230, low-cost 275, moderate 340, liberal 430; d: omnivore 1.00, vegetarian 0.92, vegan 0.95, keto 1.25. Children count 70%; 4.345 converts weekly spend to monthly.
Frequently asked questions
Are these current grocery prices or official USDA figures?
No. The calculator is a customizable US-dollar planning model with fixed adult baselines of $230, $275, $340, or $430 per month and a flat 70% child factor. Local prices and household needs vary; adjust the inputs.
Is the 60% home-cooking saving guaranteed?
No. It is a model assumption applied to the eating-out estimate, not a measured or guaranteed saving. Your actual costs depend on meal choices, food waste, local prices, and what you count as eating out.
Why does the child food cost use 70 percent of the adult figure?
The model sets child food cost at 70 percent of the adult base (P value times diet factor), reflecting that younger eaters consume less than adults. At the moderate plan of 340 dollars with two adults and two children, groceries alone run about 1,156 dollars before any eating out. The 0.7 multiplier is flat across age bands, so a teen costs the same as a toddler, which is the main simplification to watch.
Which inputs and limits apply to Grocery Budget Calculator?
Use the units shown beside each field. These are form limits, not recommended settings. Adults in the household: 0–20; Children in the household: 0–20; Meals eaten out per week: 0–42; Cost per meal out: 0–500 $; Coffee and snacks per week: 0–1,000 $ T = b×d×(A + 0.7C) + 4.345×(u + k) b lookup: thrifty 230, low-cost 275, moderate 340, liberal 430; d: omnivore 1.00, vegetarian 0.92, vegan 0.95, keto 1.25. Children count 70%; 4.345 converts weekly spend to monthly. A customizable US-dollar planning model, not a current local price survey or an official USDA estimate. Adult monthly food baselines are $230/$275/$340/$430; children are modeled at 70% of the adult base. Diet factors and the assumed 60% eating-out savings are rough model assumptions, not nutrition guidance or guaranteed savings. Adjust every input to your household and location. Use the cited guidance and your own measurements, bills or product specifications to choose inputs. Sample defaults are not current local data.
What is a complete worked example for Adults in the household = 2; Children in the household = 2?
Inputs: Adults in the household = 2; Children in the household = 2; Spending level = Moderate; Diet = Omnivore; Meals eaten out per week = 3; Cost per meal out = 18 $; Coffee and snacks per week = 25 $. Calculation: T = b×d×(A + 0.7C) + 4.345×(u + k). Results: Adult food cost = 680 $/month; Child food cost = 476 $/month; Groceries per month = 1,156 $; Eating out per month = 235 $; Total food spending per month = 1,499 $; Cost per person = 375 $; Saving if meals out were cooked at home = 141 $.