ROI Calculator: SabTools vs BankBazaar vs ClearTax — Honest Comparison (2026)

If you're trying to figure out whether a stock pick, a Bangalore rental flat, or a ₹5 lakh equipment upgrade for your shop actually made you money, you need an ROI calculator that speaks rupees, understands lakh/crore formatting, and doesn't make you sign up to see the answer. The three most common destinations Indian users land on are RapidTables, Calculator.net, and SabTools' ROI Calculator. All three compute the same underlying formula. What separates them is context, format, and how much friction they put between you and the number.

Quick verdict: For straight-up ROI math with no India-specific context (e.g., a quick percentage check on a USD trade), Calculator.net has the deepest feature set. For the fastest no-frills calculation, RapidTables wins. For Indian investors comparing real estate, mutual funds, business projects, or rental yields in ₹ with proper Indian number formatting and zero signup, SabTools is the better fit. Below is the honest breakdown.

What an ROI calculator actually has to do

The basic formula is simple: ROI % = (Net Gain ÷ Cost) × 100. But a useful ROI tool needs to do three things beyond that:

• Annualize the return so a 40% gain over 4 years doesn't look better than a 25% gain over 1 year.
• Handle holding period in years and months — most Indian property deals close on odd month counts.
• Show absolute profit/loss in ₹ alongside the percentage so you know whether 18% on ₹50,000 is worth your time.

Let's test all three calculators against a real Indian scenario: Rohan bought a 2BHK in Pune in March 2021 for ₹62,00,000. He sold it in October 2025 for ₹84,50,000. Total time held: 4 years 7 months. What's his ROI and annualized return?

The correct answer: absolute profit ₹22,50,000, simple ROI 36.29%, annualized return roughly 6.97% CAGR. Any calculator that gets all three of those numbers is doing the math right. The difference is how easily you get there.

SabTools ROI Calculator: built for Indian use cases

The SabTools ROI Calculator runs entirely in your browser — there's no signup, no email gate, and the numbers you type never leave your device. For someone evaluating a private deal or comparing returns on a property they're about to list, that privacy actually matters.

Where it earns its keep for Indian readers:

• ₹ as the default currency with Indian comma grouping (₹62,00,000 displays correctly, not 6,200,000).
• Lakh and crore awareness in the input fields — you can type "62L" or "1.2Cr" instead of counting zeroes.
• Annualized (CAGR) output right next to simple ROI, so a 2-year property flip and a 5-year mutual fund hold are immediately comparable.
• Holding period in years + months, which matters for Indian property where the long-term capital gains threshold (24 months) is a tax cliff worth knowing.
• No ad walls or upsells on the calculator itself. Guide articles do carry ads — the tool page doesn't.

Running Rohan's Pune flat through SabTools: inputs of ₹62,00,000 invested, ₹84,50,000 returned, period 4 years 7 months — output shows profit ₹22,50,000, ROI 36.29%, annualized 6.97%. The display formats every figure in Indian rupee convention.

Where SabTools is intentionally narrower than competitors: it doesn't bundle 50 unrelated calculators on the same page, and it doesn't have a US tax-adjusted ROI mode. If you need those, Calculator.net is your tool.

Calculator.net: deep features, US framing

Calculator.net's ROI calculator is genuinely the most feature-rich free option on the web. It handles:

• Investment gain, ROI percentage, annualized ROI, and investment length all in one form.
• An "investment time" mode where you can solve for holding period instead of return.
• Cross-links to dozens of related calculators (CAGR, IRR, NPV, present value) for deeper financial analysis.

For someone modeling a USD-denominated portfolio or analysing a US REIT, it's hard to beat. The math is solid and the related-tool ecosystem is the deepest in the comparison.

Where it falls short for Indian readers:

• $ as default currency with Western comma grouping (1,000,000 instead of 10,00,000). You can change the label, but the examples and explanations stay US-centric.
• No lakh/crore shortcuts — entering ₹1.5 crore means typing 15000000 and hoping you got the zeroes right.
• Tax explanations reference US brackets, not Indian sections like 112A (LTCG on equity) or 54 (capital gains rollover on property).
• The page itself runs heavy display ads above and beside the calculator. It's free, but the UX is busier than SabTools.

Running Rohan's scenario on Calculator.net gives you the same 36.29% and 6.97% — but you'll mentally translate $ → ₹ and you won't see Indian-formatted output. It works; it's just not built for the rupee-first reader.

RapidTables: fast, minimal, generic

RapidTables' ROI calculator is the no-nonsense option. Two fields, one button, percentage out. If you already know your initial value and final value and just want the ROI % in three seconds, it does the job.

Honest acknowledgement of what it does well:

• Page loads instantly. The interface is so simple there's nothing to learn.
• The formula is shown clearly above the calculator — useful if you're trying to teach yourself the math.
• Works fine on a slow connection, including the desktop browsers tier-2 cyber cafés still run.

Where it loses ground for serious Indian investors:

• No annualized return — it gives you simple ROI only. A 60% return over 10 years and a 60% return over 2 years look identical on RapidTables. They aren't.
• No currency-aware formatting — it's just numbers in, percentage out. You're on your own for ₹ vs $ vs lakh vs crore.
• No India-specific context at all — no mention of LTCG holding periods, no rental yield framing, no SIP comparison.
• It's a global utility site, not a finance site. ROI is one of hundreds of unrelated calculators sharing the same template.

For Rohan's Pune flat scenario, RapidTables will give you 36.29% — and stop there. You'd have to open a separate CAGR calculator to find the 6.97% annualized number, which is the one that actually matters.

Side-by-side: which tool does what

Feature	SabTools	Calculator.net	RapidTables
Default currency	₹ (INR)	$ (USD)	Generic
Lakh/crore input shortcuts	Yes	No	No
Annualized return (CAGR)	Yes	Yes	No
Holding period in years + months	Yes	Yes	No
Indian comma formatting	Yes	No	No
Signup required	No	No	No
Ads on calculator page	No	Yes	Yes
Calculations run on-device	Yes (browser-side)	Yes	Yes
India tax/regulatory context	Yes (LTCG, rental yield)	No (US framing)	No

ROI for rental property: where India context matters most

Rental property ROI is where generic calculators fall down hardest. The standard Indian rental yield calculation isn't just "rent received ÷ purchase price." You need to factor in:

• Annual rent minus society maintenance and property tax.
• Vacancy — most landlords budget 1 month of vacancy per year (8.3%).
• Carpet vs super built-up area — RERA requires carpet-area-based rent benchmarking in most cities now.
• Capital appreciation on resale value, separate from rental yield.

Worked example: Priya buys a 2BHK in HSR Layout, Bangalore, for ₹95,00,000 in 2025. She rents it out at ₹38,000/month. Annual maintenance + property tax: ₹62,000. Expected vacancy: 1 month.

Effective annual rent = (₹38,000 × 11) − ₹62,000 = ₹3,56,000. Gross rental yield = ₹3,56,000 ÷ ₹95,00,000 = 3.75%. That's typical for Bangalore — and it's the number to compare against a bank FD or debt mutual fund before deciding the property is "passive income."

SabTools' ROI calculator handles the pure-return math; pair it with the Carpet Area Calculator to verify the per-sqft price you're paying, and the Home Loan Affordability calculator if you're financing the purchase. Calculator.net and RapidTables don't offer this kind of Indian-real-estate-specific tool chain in one place.

ROI on a small business investment

For a small business owner — say a kirana store in Hyderabad deciding whether to spend ₹4,50,000 on a billing/inventory system that will save ₹15,000/month in operational losses — ROI is the cleanest decision metric.

Inputs: ₹4,50,000 invested, ₹1,80,000 annual saving, 3-year evaluation horizon. Total return ₹5,40,000. ROI = 20%, annualized ≈ 6.27%. If you're evaluating multiple equipment upgrades against each other, SabTools' Indian-format output makes the comparison readable at a glance. For invoicing the new system, the GST Invoice Generator handles CGST/SGST splits without a paid SaaS subscription. If you're spinning up a sub-brand, the Business Name Generator is in the same toolset.

ROI vs SIP returns: when to use which

ROI works for lump-sum, single-entry, single-exit investments — a stock buy, a property purchase, a fixed deposit, a one-time business spend. It does not handle recurring monthly contributions well, because a ₹10,000/month SIP for 5 years has 60 different "entry costs," each held for a different duration.

For SIP returns, you want XIRR-based calculation, which is what the SIP Calculator handles. For loan repayment math (where the question is "how much will I pay monthly"), use the EMI Calculator. Calculator.net has separate SIP/IRR pages too — RapidTables doesn't really offer an India-aware equivalent.

Privacy and data handling

This is the unglamorous comparison point that matters more than people admit. When you type the purchase price of an unsold property, or the cost basis on shares you're about to exit, you'd rather that data not be logged anywhere.

• SabTools: all ROI math runs in JavaScript on your browser. No values are sent to a server, no account exists to log against. Closing the tab clears the data.
• Calculator.net: similarly client-side calculation, but the page itself loads display ads from third-party networks that fingerprint and track session behaviour at the page level. The math is private; the visit is not.
• RapidTables: client-side math, ad-network tracking similar to Calculator.net.

None of these tools are "stealing" your numbers. But if you care about the difference between client-side math on an ad-free tool page versus client-side math on an ad-laden page, SabTools is the cleaner experience.

Bottom line: which to pick

• Pick RapidTables if you only need simple ROI %, you don't care about annualized return, and you want the fastest possible page load.
• Pick Calculator.net if you're modeling US-denominated investments, you want IRR/NPV in adjacent tabs, or you're an analyst who values deep feature coverage over Indian formatting.
• Pick SabTools if you're an Indian investor or business owner evaluating returns in ₹, you want annualized return without opening a second tab, and you'd rather skip the ads and signup gates. The lakh/crore inputs and rental-yield-friendly format save real time on every calculation.

None of these tools are wrong. They're built for different readers. If you're reading this in rupees, the answer is probably obvious — but it's worth knowing the alternatives exist and where they win.

Ready to run the numbers? Try SabTools' ROI Calculator →

Quick FAQ

Which calculator is best for ROI on Indian rental property?

SabTools, because it handles ₹ formatting and pairs with the Carpet Area Calculator for per-sqft sanity checks. Calculator.net's ROI page works mathematically but won't reflect Indian rental conventions like 1-month vacancy assumptions or RERA carpet-area pricing.

Does SabTools' ROI Calculator give annualized return (CAGR)?

Yes. Enter the holding period in years and months and you'll see both simple ROI % and annualized CAGR % side by side. RapidTables only shows simple ROI; Calculator.net shows both but in US framing.

Is the calculator free to use without an account?

Yes — no signup, no email, no paid tier. The calculator runs in your browser and no values are transmitted to a server.