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Making soup at home vs buying soup calculator
Put your days, home cost and buying cost in: 20 days at $3.00 at home is $60.00 a month against $180.00 bought at $9.00, so home saves $120.00 a month.
★ COMPARISONS · FOOD · HOME VS BUYING SOUP
Home Soup vs Buying Soup: Save $120 a Month, $1,440 a Year
On the defaults — 20 soup days a month, $3.00 a day at home against $9.00 a day bought — home soup costs $60.00 a month against $180.00 bought, so home saves $120.00 a month and $1,440.00 a year. This is the SOUP version of the daily-habit comparison — the making-snacks-at-home-vs-buying-snacks page is the SNACKS version — 20 days at $2.00 at home against $6.00 bought; the packing-lunch-vs-buying-lunch page is the LUNCH version — packing against buying lunch daily; the making-breakfast-at-home-vs-buying-breakfast page is the BREAKFAST version — home breakfast against a bought one; and the making-smoothies-at-home-vs-buying-smoothies page is the SMOOTHIE version — home smoothies against shop-bought ones.
What does $120.00 a month of home soup saving mean?
It means that eating soup at home costs $60.00 a month — 20 days at $3.00 a day for ingredients — against $180.00 a month for the same 20 soups bought at $9.00 each, so the home habit keeps $120.00 a month and $1,440.00 over a year. The two totals are the whole story in miniature: the home total is days times the ingredients cost, the bought total is the same days times the shop price, and the saving is the gap between them. The part people get wrong is comparing one soup against one soup: a single bought soup is only $6.00 more than a home one, which sounds small, but over 20 days that $6.00 daily gap is $120.00 a month. The other part people get wrong is the reverse — pricing home soup at the shop price, or forgetting the days they actually eat soup, which either erases the saving or invents one.
Three things to check before you trust the number
Is $3.00 really your home cost, or just the vegetables? Three dollars is the full ingredients cost of one home soup, and it is the figure the home total turns on: the $5.00-home-cost branch totals $100.00 a month against the $60.00 headline, so a $2.00 ingredients difference is $40.00 a month over 20 days. If your soup also needs broth, protein, or a container you replace, those belong in the $3.00 — a home cost that counts only the vegetables understates the home total and inflates the saving.
Is $9.00 really your bought cost, or just the menu price? Nine dollars is the full price of one bought soup, and it is the figure the bought total turns on: the $5.00-buying-cost branch saves only $40.00 a month against the $120.00 headline, so a $3.00 bought-price difference is $60.00 a month over 20 days. If you always add a drink, a tip, or delivery, those belong in the $9.00 — a bought cost that counts only the menu price understates the bought total and understates the saving.
Are 20 days really your soup habit? Twenty days is the monthly count, and it is the figure both totals turn on: the 15-day branch saves $90.00 a month against the $120.00 headline, so five fewer soup days are $30.00 less saving. Soup habits vary by week, so average three honest months rather than taking your healthiest month — a January reset priced as a year-round habit overstates the saving by exactly the extra days.
Worked example
On the defaults: 20 soup days a month, $3.00 a day at home, $9.00 a day bought.
- Home total per month: 20 × $3.00 is $60.00.
- Bought total per month: 20 × $9.00 is $180.00.
- Saving per month: $180.00 − $60.00 is $120.00.
- Saving per day: $9.00 − $3.00 is $6.00.
- Saving per year: $120.00 × 12 is $1,440.00 — and the break-even buying cost is $3.00 a day, exactly even with home.
And the other way: the home cost behind $120.00 a month of saving is $3.00 a day, and the buying cost behind $120.00 a month of saving is $9.00 a day. With 0 soup days the model honestly shows $0.00 against $0.00 — exactly even — because a habit with no days has no totals on either side. And when the buying cost equals the home cost at $3.00 a day, the model again shows exactly even: $60.00 against $60.00, no saving either way.
Every branch, checked
- $5.00 buying cost, same days and home cost: $5.00 buying cost, same days and home cost: Home $60.00 vs buying $100.00 — home saves $40.00 a month.
- $5.00 home cost, same days and buying cost: $5.00 home cost, same days and buying cost: Home $100.00 vs buying $180.00 — home saves $80.00 a month.
- 15 days, same costs: 15 days, same costs: Home $45.00 vs buying $135.00 — home saves $90.00 a month.
- 25 days, same costs: 25 days, same costs: Home $75.00 vs buying $225.00 — home saves $150.00 a month.
The reverses, worked backwards
- Home cost behind $120.00 a month saving: $3.00 a day — at $3.00 a day the figures are Home $60.00 vs buying $180.00 — home saves $120.00 a month.; at the lower neighbor the figures are Home $50.00 vs buying $180.00 — home saves $130.00 a month.; at the upper neighbor the figures are Home $70.00 vs buying $180.00 — home saves $110.00 a month..
- Buying cost behind $120.00 a month saving: $9.00 a day — at $9.00 a day the figures are Home $60.00 vs buying $180.00 — home saves $120.00 a month.; at the lower neighbor the figures are Home $60.00 vs buying $160.00 — home saves $100.00 a month.; at the upper neighbor the figures are Home $60.00 vs buying $200.00 — home saves $140.00 a month..
What the defaults assume
The defaults are 20 soup days a month at $3.00 a day at home against $9.00 a day bought, so the headline is one soup eater for one year with a steady weekday habit. The model is two multiplications and a subtraction: the home total is days times the home cost, the bought total is days times the buying cost, and the saving is the bought total minus the home total, times 12 for the year. The home-cost reverse is checked at $0.50 either side, because $0.50 over 20 days is $10.00 a month; the buying-cost reverse is checked at $1.00 either side, because $1.00 over 20 days is $20.00 a month. The model does not include the time spent making soup, the cost of wasted ingredients, or the health difference between the two soups — price those separately, and read the lunch comparison for the same method on a full meal.
Output · formula · meaning
| Output | Formula | What it means |
|---|---|---|
| Home total per month | days × home cost per day | $60.00 — 20 × $3.00. |
| Bought total per month | days × buying cost per day | $180.00 — 20 × $9.00. |
| Home saving per month | bought total − home total | $120.00 — $180.00 − $60.00. |
| Home saving per year | home saving per month × 12 | $1,440.00 — $120.00 × 12. |
| Home saving per day | buying cost per day − home cost per day | $6.00 — $9.00 − $3.00. |
| Break-even buying cost | home cost per day | $3.00 a day — at $3.00 bought, home and bought are exactly even. |
| Home cost behind a target saving | buying cost per day − target saving ÷ days | $3.00 — $9.00 − $120.00 ÷ 20. |
| Buying cost behind a target saving | home cost per day + target saving ÷ days | $9.00 — $3.00 + $120.00 ÷ 20. |
| Home total as a share of the bought total | home total ÷ bought total | 33.33% — $60.00 ÷ $180.00, home soup costs exactly a third of bought. |
| $5.00 buying cost, same days and home cost | same model | Home $60.00 vs buying $100.00 — home saves $40.00 a month. |
| $5.00 home cost, same days and buying cost | same model | Home $100.00 vs buying $180.00 — home saves $80.00 a month. |
| 15 days, same costs | same model | Home $45.00 vs buying $135.00 — home saves $90.00 a month. |
| 25 days, same costs | same model | Home $75.00 vs buying $225.00 — home saves $150.00 a month. |
| Home cost behind $120.00 a month saving | reverse | $3.00 a day: Home $60.00 vs buying $180.00 — home saves $120.00 a month. |
| Buying cost behind $120.00 a month saving | reverse | $9.00 a day: Home $60.00 vs buying $180.00 — home saves $120.00 a month. |
| 0 days | same model | Home $0.00 vs buying $0.00 — exactly even. |
| Negative days | same model | Days per month — 0 or more. |
| Negative home cost | same model | Home cost — $0 or more. |
| Negative buying cost | same model | Buying cost — $0 or more. |
Who uses this
- A soup eater checking a daily habit — $3.00 at home against $9.00 bought are $120.00 a month, with the branches showing what a cheaper bought soup or a pricier home soup are worth before the habit changes.
- A household trimming a food budget — the 15-day and 25-day branches price a lighter or heavier soup habit at once, so a food budget change can be costed before it is agreed.
- A meal prepper comparing routines — the break-even line shows the bought price at which home prep stops saving money, so a prep routine can be judged on cost as well as taste.
- A budgeter hunting the biggest daily leak — the per-day saving of $6.00 ranks soup against snacks, lunch, and coffee, so the habit with the biggest gap gets fixed first.
Accuracy & limitations
Figures are the model’s own arithmetic on the numbers you type, computed from unrounded values and displayed rounded HALF_UP to 2dp. The main limitation is the inputs, not the arithmetic: whether the home cost covers every ingredient, whether the bought cost covers every add-on and tip, and whether the day count is an honest average are all judgement calls, and this page prices the figures you enter without checking them. This page is a calculation tool, not financial advice.
Cite this calculator
Home soup at $3.00 a day for 20 days costs $60.00 a month vs buying at $9.00 a day for $180.00: home saves $120.00 a month and $1,440.00 a year. Source: Bright Side Kit, https://brightoolbox.com/making-soup-at-home-vs-buying-soup/, accessed 29 October 2026.
Frequently asked questions
What counts as the home cost per day?
The full ingredients cost of one home soup: greens, vegetables, dressing, and any protein or topping you add. A home cost that counts only the leaves understates the home total and inflates the saving.
What counts as the buying cost per day?
The full price of one bought soup: the menu price plus any drink, add-on, delivery fee, or tip you always pay with it. A bought cost that counts only the menu price understates the bought total and understates the saving.
What if I only eat soup on weekdays?
Enter your real soup days, not 20 by default: 20 days is roughly four weeks of weekdays, but a three-day-a-week habit is about 13 days a month, and the saving falls with the days. Count the days you actually eat soup over three months and average them.
What if buying costs less than making it at home?
Then the model says home costs more, honestly: a bought soup cheaper than the home ingredients flips the saving negative, and the result reads as home costing more a month. That is the model working, not an error — a home habit only saves money while the ingredients stay cheaper than the shop price.
When is home soup exactly even with bought soup?
When the buying cost equals the home cost: at $3.00 a day bought, the totals are $60.00 against $60.00 and the saving is $0.00. That is the break-even line, and any bought price above it makes home soup the cheaper habit.
Does the saving include my time?
No: this page compares money only, not the minutes spent washing, chopping, and packing a soup. If your time has a price, add it to the home cost per day and the saving will fall accordingly — the break-even line moves with it.