Our take
Sharp R-305KS is a stainless 1.0-cu.-ft. home-use countertop microwave. Its operation manual covers the R-305K family and explicitly defines the following S as stainless steel; Sharp's exact-code service manual separately confirms R-305KS exists as a model. The operation guide specifies 1,100 W output measured using the IEC procedure, eleven preset power levels, and a 12⅝-inch turntable system. It also documents Reheat/Cook, popcorn, defrost, Short Cuts, a timer/clock, Minute Plus, and a child lock. Installation guidance is practical but specific: plan for two inches of space at both sides, the top, and the rear, with counter space on at least one side. The older Amazon ASIN has not been verified against a current exact-model offer, so use the tagged search and check the suffix before buying.
A stainless household countertop microwave for shoppers who want 1,100 W output, a measured turntable, and several programmed food functions.
Choose another model if sensor cooking, a documented trim kit, a larger cavity, or proof that historical ASIN B00192D0PA maps to a current offer is essential.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The manual gives a standardized 1,100 W IEC output figure and separately identifies 1,530 W/13 A electrical input.
- A 12⅝-inch turntable is documented, giving shoppers a useful size reference for plates and cookware.
- The control guide covers eleven power levels, multiple automatic food functions, three-stage sequencing, Minute Plus, and child lock.
What to weigh up
- The 1.0-cu.-ft. cavity is smaller than many 1.4- to 2.2-cu.-ft. models in this comparison set.
- The reviewed exact-model material does not confirm sensor cooking or optional built-in trim-kit compatibility.
- The historical ASIN is not current identity proof, so an Amazon search result must be checked for R-305KS rather than assumed to match.
The key details
| Model covered | R-305KS |
|---|---|
| Capacity | 1.0 cu. ft. stated cavity capacity |
| Microwave output | 1,100 W microwave output under the IEC test procedure; 1,530 W/13 A input |
| Cooking approach | Eleven power levels, defrost, popcorn, Reheat/Cook, Short Cuts, and up to three cooking sequences |
| Installation options | Countertop placement; manual calls for 2 in. at each side, top, and rear; no trim kit documented |
| Finish and turntable | Stainless steel per the R-305K suffix map; 12⅝-in. turntable system |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
The S suffix has a documented meaning
Sharp's operation manual names the R-305K family and says the letter that follows indicates color, with S meaning stainless steel. That makes the frozen row's full code R-305KS meaningful evidence for a stainless variant rather than a seller-created abbreviation. The exact-code service manual also carries R-305KS on its title page, while the operating instructions describe the shared R-305K family. This microwave remains separate from Sharp R-315JS and R-220KW: their model codes and documented capacity/output profiles differ. The historic Amazon title agrees with the S suffix, but the ASIN B00192D0PA has not been matched to a current exact product page. Use an exact-code search and confirm the product-label suffix before treating an offer as this model.
Compact capacity with a measured rotating tray
The specification table lists a nominal 1.0-cu.-ft. cavity and notes that its capacity calculation uses the maximum internal width, depth, and height; the actual usable food space is less. It also specifies a turntable system with a 12⅝-inch diameter. That tray measurement helps compare plate size more directly than the overall cavity volume, although dish handles and the rotating clearance still matter. Sharp lists body dimensions of 20½ inches wide, 17 inches deep, and 12¼ inches high, with a listed approximate weight of 32 pounds. These numbers support a counter-space check, but they do not guarantee that a particularly tall dish or wide platter will fit. Measure cookware and compare it with the actual opening and tray before relying on the nominal capacity alone.
Output and electrical demand should not be conflated
Sharp specifies 1,100 W microwave output and marks the figure as measured under the IEC test procedure, a standardized way to report microwave cooking output. The same table separately lists 1,530 W and 13 A of electrical power required at single-phase 120 V, 60 Hz. For a wattage comparison with other ovens, use the 1,100 W output figure; the higher input number describes the electrical supply demand. The manual does not promise a particular cooking time or performance for any recipe. It gives shoppers a sound specification to compare while reminding them that results depend on food, cookware, quantity, and selected power level. Verify that the available outlet and circuit meet the manufacturer's requirements rather than assuming output watts describe the full electrical load.
A control set built around named routines
The operation manual describes eleven preset power levels, including the full range from high down through lower settings and zero. It documents automatic Defrost, Popcorn, Reheat/Cook, and Short Cuts for functions such as melting, softening, and warming. Up to three cooking sequences can be programmed to move between time and power settings, and Minute Plus starts a one-minute cook at full power. A timer/clock and a child-lock feature are also described. These are fixed controls and menu functions; the manual text does not identify sensor cooking or say that the oven adjusts a cycle based on humidity. SensorCooking therefore remains unknown rather than being inferred from the word “automatic” in a menu description. This is a better fit if manual power selection and labeled shortcuts meet the routine.
Countertop placement and cabinet installation are separate questions
For location, Sharp recommends counter space on at least one side and at least two inches at the sides, top, and rear for air circulation. The guide cautions against locating the oven near sources of heat and steam such as a conventional range or wall oven. Those details help assess an open counter location and nearby appliances. The reviewed exact-model manual does not name an optional built-in trim kit, a cabinet opening, or an approved enclosed installation. That leaves trimKitCompatible null. The countertop guidance does not establish a trim-kit route, and the absence of a kit reference is not proof that no kit ever existed. If cabinet integration matters, obtain current model-specific kit confirmation and opening measurements rather than relying on the R-305KS exterior dimensions.
Household classification and purchase checks
Sharp describes the R-305K as a Home Use Carousel Microwave Oven and says this appliance type is not designed for industrial or laboratory use. That supports household classification for matching and rules out treating “Carousel” or its silver finish as evidence of commercial foodservice duty. The manual and identity cross-check establish the family/suffix relationship, output, tray size, and operating features, but they do not prove the old Amazon ASIN is currently attached to an exact R-305KS listing. They also do not document a sensor or built-in trim kit. Confirm the exact product label and current installation guide if those details affect your decision. This review summarizes documented specifications, not personal testing, customer review trends, or current price and availability.
What else to compare
Sharp R-315JS is a separate 1.2-cu.-ft. model with 1,200 W output and a 12⅝-inch tray. Sharp R-220KW is smaller at 0.8 cu. ft. with 800 W output and a 10.75-inch tray. LG LCRT1510SV adds a 1.5-cu.-ft. capacity and documented sensor cooking. R-305KS is the stainless 1.0-cu.-ft. Sharp here with its own 1,100 W rating and 12⅝-inch turntable; sensor and trim-kit support remain unconfirmed.
Before you buy
What does the S at the end of R-305KS mean?
Sharp's R-305K operation manual says the letter after the family code indicates color and specifically defines S as stainless steel.
How large is the turntable and how much output does it have?
Sharp lists a 12⅝-inch turntable system and 1,100 W microwave output under the IEC test procedure.
What does the manual list for electrical input?
The specification table lists single-phase 120 V/60 Hz supply and 1,530 W at 13 A, separately from 1,100 W output.
Does Sharp confirm sensor cooking or built-in installation?
The reviewed operation manual has preset cooking functions and countertop clearances, but does not confirm a sensor or a compatible trim kit.
How much clearance does R-305KS need on a counter?
Sharp recommends at least two inches at the sides, top, and rear, plus counter space on at least one side for practical placement.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Sharp R-305K operation manual with color suffix map ↗ — checked October 4, 2026.
- Sharp R-305K operation manual; suffix key, home-use classification, installation, controls, and specifications ↗ — checked October 4, 2026.
- Sharp R-305KS service manual, used only to cross-check the exact model code ↗ — checked October 4, 2026.
The decision
Choose Sharp R-305KS if a 1.0-cu.-ft. stainless countertop microwave, 1,100 W IEC output, and 12⅝-inch turntable match your needs. Its manual gives several useful presets and precise counter clearances. Confirm the complete R-305KS label and current offer identity, and do not assume sensor cooking or a built-in kit from the automatic-menu descriptions or countertop installation section.
Is it the right fit?
Check the exact model and today’s offers on Amazon.